The podcast critically examines the scientific validity of the term "ultra-processed food," revealing that it lacks a clear, consistent, or universally agreed-upon definition. Despite widespread use in public policy and health discourse, the classification is riddled with contradictions and arbitrary boundaries—such as including frozen pizza or bread while excluding cheese or honey. The Nova classification, introduced in 2017 as a scientific framework, still shows inconsistencies across studies and is often misapplied, leading to misleading conclusions. Key research, including a high-profile study by Kevin Hall, demonstrates that ultra-processed diets differ significantly in energy density and content (e.g., sugar, saturated fat) from unprocessed diets, but the comparison relies on artificial, unrepresentative meals (like multiple desserts) rather than real-world eating. Observational studies show mixed or weak associations with health outcomes, with no clear dose-response effect—meaning the harm isn't linear, and some groups actually show lower risks at lower consumption levels. Furthermore, the term often conflates food processing with health harm, ignoring that both traditional and industrial foods are produced by large corporations. Critics argue that the concept functions more as a moral or political tool than a scientific one, diverting attention from actual nutritional content or systemic issues like meat consumption and climate impact. Ultimately, the podcast concludes that while ultra-processed foods may contribute to unhealthy diets, the term itself is poorly defined, inconsistently applied, and often used to simplify complex dietary and economic realities.
uh what do you have i have one too even though it's not my turn but what is yours wait i want
to know what yours is no no no no i want to see what you do with it first hi everybody and welcome
to maintenance phase the podcast that's finding new and exciting ways to stigmatize the foods you
love oh that's good that's very direct on brand the other thing that i thought about as an opening
is uh asking you what your favorite ultra processed food is mine is smoked salmon oh
nutella oh no mine was gonna be uh welcome to maintenance phase the podcast that is finally
going to tell the story of yellows one through four uh i'm michael humps i'm aubrey gordon if
you would like to support the show you can do that at patreon.com maintenance phase or you can
subscribe to my channel and hit the bell icon so you don't miss out on any of my new videos
to premium episodes on apple podcasts it's the same content same content michael we're talking
about ultra processed foods and this is a thing that people are like sort of constantly asking
us to cover asking us to talk about all of that sort of stuff and i am fascinated to hear where
we land well okay so the bad news is we have to start with the same tedious caveat that we start
every episode with this is like my test of like can i do research without
going down a bunch of like unnecessary rabbit holes and then cutting like hours of footage
out of the show the one thing we're going to talk about is like the definition of processed food oh
my god i can't wait i think the core challenge of talking about this in a nuanced way is that
there are two definitions there is the colloquial definition of processed food like when you are
going about your business you constantly hear people say like i'm trying to avoid processed
foods it's one of those concepts that is sort of like i know it when i see it that's what i was
uh welcome to maintenance phase the podcast where like pornography we can't define ultra
processed foods exactly we know them when we see them right like you kind of know that a twinkie
is like an ultra processed food you know that wonder bread is an ultra processed food and i
i want to say that like as a colloquial matter i don't really police this stuff like if if i'm
with somebody and they say like oh i'm trying to cut back on processed foods i'm not like how are
you defining that the research disagrees with you yeah if you are a person who's trying to avoid
processed foods like you're not going to be able to do that you're not going to be able to do that
you know what that means there's all kinds of kind of arbitrary concepts in our lives that we still
manage to live by and i think this is totally fine the question that we're trying to confront on the
show is like is this useful as a scientific concept and as a concept that is now driving
policy yeah so there are numerous countries that are passing taxes on processed foods we talked in
our last episode about how rfk jr potentially might want to remove quote processed foods from
food stamps and so you know i'm not going to be able to do that i'm not going to be able to do that
it's kind of fine to have a colloquial understanding of a term that it's like a little murky or a little
you know sort of changes depending on the circumstances but if we're going to be passing
laws and if we're going to be putting out studies that say okay ultra processed foods is associated
with a five percent higher risk of cardiovascular disease we need to have a clear understanding of
what this term means i also think there is a way that sort of processed food has come to act as a
stand-in for what folks maybe previously would have referred to as quote-unquote junk food god
damn it aubrey this is in my conclusion
there's sort of an understanding that it might be uncouth or sort of judgmental to refer to some
foods as quote-unquote junk foods and processed sounds like more technical or more descriptive
or something to people fine aubrey i'll scroll down to the part of my notes where i have
information about this you know i was thinking about this episode last night and i was looking
at my beloved bean shelf do my beans count as ultra processed what about i don't know i don't
have a jar of barley is that ultra processed the closer you get to trying to find a line the murkier
it gets right it's very sort of impressionist it makes sense from a distance and then you get up
close and you're like no the thing is the more i've read about this the more i actually i think
i prefer the term junk food because when people say junk food you know that it doesn't actually
have a lot of informational content it basically just means like food i don't like you're like
okay everybody's going to define it differently whereas processed food feels objective yeah
but like it turns out to be like just as arbitrary it just sounds less arbitrary there is something
that is genuinely helpful about people just sort of owning up to their judgments and biases because
then you actually can have a conversation about it exactly versus someone who goes oh it's not
junk food it's ultra processed foods totally where they just sort of keep sort of seeking
a new refuge from any kind of conversation about how they actually feel so the the first thing to
know about the term processed food is that it's been around like
much longer than i knew so i went on that like google gram thing that is like how much is this
term being used the first reference that it has for processed food is from 1912 you can find old
articles in like the new york times like decrying processed food and how it's harming people one of
the first articles i found was from 1970 called bread is fatal to rats but that's not the point
wait wait wait mike wait on are you doing a rat sound
board right now i'm not i don't i'm not doing this god uh i'm trying to find my fucking zoom
window to turn on the camera oh wow when is this from this appears to be from the 50s i found this
in an antique shop it's a print that says bread helps to keep up your energy in this sensible
reducing diet bread helps burn up safely the fat you lose dude bring back this graphic design it
looks like a lot of words and then like people at a prom or something because they ate bread also now i want a rat soundboard sorry this is okay i know i said i wasn't gonna go down rabbit holes and shit but the first paragraph of this article is for what may be the 1000th time the question of whether or not rats can live on nothing but ordinary white bread has been raised once again i'm like is that is that something we were raising a lot in the 1970s sorry are we coming back to this one a bunch just like a first date question
fascinating where are you from do you have any siblings can rats live on bread if a tree falls
in the woods around here it doesn't make a sound can rats live on bread so this is a study where
they fed rats like ordinary white bread of course like refined flour you know they remove a lot of
the fiber a lot of the nutrients etc if you feed rats just white bread they do die like they starve
to death basically because there's not enough nutrients however if you feed them an enriched
white bread that has these vitamins and minerals put back in
they live yeah but what's interesting to me is like in this article from from the very beginning
of this term nobody could really define what processing is because one way to think about
it's like okay you're processing the wheat you're taking out all the nutrients but also
boiling down foods to get the nutrients out and turning them into powders and putting them into
bread is also processing it's arguably 100 more processing yeah this is just a different kind of
processing so it's like everyone uses the term process just to mean like food i don't like
food that i think is bad right absolutely like there are very few definitions of processed foods
in terms of the like colloquial usage that would include like olive oil this does actually get to
like the biggest problem with the term and the biggest problem with like efforts to define it
so the term becomes much more popular in the early 2000s especially with like the rise of
michael pollan i went back to the omnivores dilemma for this and like he refers to processed foods
many times but he doesn't refer to ultra processed foods the term ultra processed is coined in
2009 by a brazilian researcher named carlos montero who had been doing kind of field work
in brazil in the 1970s and 1980s originally on malnutrition but he was noticing with these poor
populations eventually the problem of malnutrition had started to shift to what he calls over
nutrition you you basically have as the brazilian economy is developing there's more of these like
commercial foods being produced and traditional diets are starting to give way to like you know
sodas and twinkies and all the kind of stuff we associate with ultra processed foods
so in 2009 he puts out the first use of this term in academia ultra processed and also an attempt to
define it so this is a paper called the issue is not food nor nutrients so much as processing
so i'm going to send you the first couple paragraphs it is now generally acknowledged
that the current pandemic of obesity and related chronic diseases has as one of its important
causes increased consumption of convenience and pre-treatment foods
pre-prepared foods however the issue of food processing is largely ignored or minimized in
education and information about food nutrition and health and also in public health policies
so this is happening in the context of this shifting understanding of food right that
the original understanding of like quote-unquote unhealthy food was food that was high in saturated
fats right we talked about this coming out of the 1950s it was like we need to cut down on fat
then in the early 2000s we get this stigmatization of sugar and carbs yeah and so what montero
was saying is like we need a more holistic understanding of this that it's not just
like you measure the grams of sugar and then you're like this food is level eight bad like
that's really one dimensional we need a three-dimensional understanding and that comes
from understanding the way that the food is made basically god the whole time you're talking about
this i'm just thinking about other foods that are ultra processed protein protein powder protein
powder that's all we're getting there we're getting there we're getting athletic greens
you read two more paragraphs aubrey and then we'll get to the fun part which is
us trying to define what ultra processed food is.
Fucking dunking on Huel.
Yes. Fuck you, moon dust.
So I'm sending you these paragraphs about where he lays out, like,
what is the problem with ultra-processed foods?
Modern diets usually do contain some unprocessed plant foods and meat and milk,
but also keep several of the unhealthy features of the processed ingredients they are mostly based
on. Low nutrient density, little dietary fiber, and excess simple carbohydrates, saturated fats,
sodium, and trans fatty acids. What makes snacks, drinks, dishes, and meals mainly made up from the
ultra-processed foods different from traditional dishes and meals is that they are inalterable.
They come ready to eat or heat. Diets that include a lot of ultra-processed foods are
intrinsically nutritionally unbalanced and intrinsically harmful to health.
Well, now hang on. Are you going to mention exactly what I was about to say?
Like, you can say this, but what?
We just talked about, like, enriched flour and enriched cereals, right?
That, like, growing up, yes, absolutely, breakfast cereal was kind of everywhere,
but all of that breakfast cereal was, like, very prominently labeled as being enriched with
vitamin A, vitamin C, vitamin B. I don't know that you can argue necessarily that it's
intrinsically nutritionally unbalanced. Again, athletic greens is an ultra-processed food
that adds a lot of nutrients to your diet. So, like, I don't know. I don't know. I don't know.
It advertises itself as being nutritionally balanced, right?
There's also this core problem that you find in, like, every single paper about this where
it says, okay, it's not about the nutrients. It's not about what's inside of the food. It's about
the processes by which the foods are made. And then it's like, okay, why are ultra-processed
foods bad? It's about what's in the food. So, he's saying they're high in fat,
they're high in sugar, and they're calorie dense.
Oh, my God, Mike. Are we going to end up doing the reporting version of that Breyers commercial
from the 90s where they made. Where a little kid tried to read the ingredients on a bucket of ice cream?
Oh, that was a Breyers commercial? I actually looked up the ingredients of Breyers for this
episode.
Yeah, because they were like, but look at Breyers. And the kid was like, milk, cream,
sugar.
Guargum? That kid could pronounce Guargum?
It just really feels like that's sort of where we're headed.
We finally get to, like, the meat of this paper and, like, just such fucking mic bait,
the attempt to actually operationally define what ultra-processed food is. So, he proposed,
in 2009, this classification that has three groups. Every single person who writes about
ultra-processed food has, like, the same paragraph where they're like, well, all food is processed.
Yeah.
Slicing up an apple is processing it, but it has no nutritional content whatsoever. But also,
like, Pringles, like, making, like, a slurry of potato and then shaping it into, like, chip shape
is also processing. It's like, this term encompasses such a wide range of activities that it's probably
better to just find a way to do it.
Find a different term. So, he does acknowledge this. So, the first group in his classification
is minimally processed foods or unprocessed foods. Obvious stuff, right? Of, like, you pick an apple
from the tree and it's, like, a group one food, right? But then he also acknowledges that even
these foods include processing. So, he says, such processes include cleaning, removal of
inedible fractions, portioning, refrigeration, freezing, pasteurization, fermenting, pre-coating,
drying, skimming, bottling, and packaging.
Skim milk, process.
This is the problem.
Process is fun.
It's, like, he's saying these are forms of processing, but, like, they don't count.
It's not about whether foods are processed. It's about, like, the intensity of the processing.
Yeah. It just feels real goofy to be, like, the dried beans are not processed,
but you put them in a can and then they are.
So, that is group one. These are foods that are, like, they're processed, yeah,
but they're not, like, ultra processed. So, they're good.
We're going to look through them.
It's the other way.
Yeah, they're fine, right?
Yeah.
Group two is substances extracted from whole foods. So, this is anything like, you know,
refining flour.
Oh, is that my olive oil?
Yes, this is olive oil. So, when you press olives, you get oil out of them. This is,
again, also a form of processing, but it's not, like, the bad kind of processing.
You're basically making ingredients out of whole foods.
Yeah.
So, he says,
Traditionally, they are ingredients used in the domestic preparation and cooking of dishes
mainly made up of fresh,
and minimally processed foods.
Because all of this is based on his work with, like, traditional families and, like,
rural poor populations in Brazil, what he's really trying to do with this classification
is separate kind of traditional food practices from modern food practices, right?
This is a critique of the modern food system. And so, what he's doing with group one and two
is, like, well, yeah, you know, if you look at, like, a poor family in rural Brazil,
like, they might be using some flour. They're probably using some oil when they, like,
saute vegetables.
They're using spices.
Technically, that's processing, but that's not the kind of processing that is going to
be harmful to health.
These are, like, traditional practices, right?
But then he contrasts this with group three, which is ultra-processed foods.
So, we're finally getting to the definition of ultra-processed foods.
So, here is this.
These are made up of group two substances to which either no or relatively small amounts
of minimally processed foods are added, plus salt and other preservatives, and often,
also, cosmetic additives, such as flavors and colors.
This group of foods includes breads, cookies, ice creams, chocolates, candies, breakfast cereals,
cereal bars, potato chips, and savory and also sweet snack products in general,
and sugared and other soft drinks.
That's the kind of you-know-it-when-you-see-it thing.
Meat products, such as nuggets, hot dogs, burgers, and sausages made from processed
or extruded remnants of meat, can also be classified as ultra-processed foods.
Boy.
Boy, if anyone ever describes anything I'm eating as extruded remnants of meat.
I mean, that's what they are.
It's true, and I don't want to hear it.
I know.
Don't think about it.
Ultra-processed foods are basically confections of group two ingredients, typically combined
with sophisticated use of additives to make them edible, palatable, and habit-forming.
They have no real resemblance to group one foods, although they may be shaped, labeled,
and marketed so as to seem wholesome.
Unlike the ingredients included in group two, ultra-processed foods are typically not consumed
with or as part of minimally processed foods, dishes, and meals.
They are designed to be ready-to-eat, sometimes with addition of liquids such as milk, or
ready-to-heat, and are often consumed alone or in combination, such as savory snacks with
soft drinks, bread with burgers.
It really feels like a very vibey definition.
The core definition is that. That ultra-processed foods are made up of group two substances to which either no or
relatively small amounts of minimally processed foods are added.
So the idea is that these products are majority like oil and fat, like something like Nutella,
which is like 13% hazelnuts, and effectively everything else is just like oil and sugar.
But Michael, that's not typically consumed with or as part of minimally processed foods,
dishes, and meals, which means. I'm sorry, you never have dipped a banana into Nutella.
You know, earlier he said, like, the problem with ultra-processed foods, right, is that
they're very high in sugar, they're high in fat, they're very calorie-dense, but then
he includes things in ultra-processed here that are not particularly high in sugar or
fat or energy-dense.
Like, all breads, you're including tortillas.
This also excludes a lot of foods.
This definition does not include potato chips, because, like, I looked at Lay's potato chips.
Like, Lay's original potato chips have three ingredients.
Yeah, yeah, yeah.
It's potatoes, oil. Yeah.
Oil and salt.
Yeah.
And, like, lots of French fries also are just three ingredients, right?
It's potatoes, oil, and salt.
That's kind of, like, the canonical food of, like, you shouldn't be eating so many potato
chips.
You shouldn't be eating French fries.
But those actually count as minimally processed foods under this definition.
Yeah.
You're saying ultra-processed foods are bad for you, but then you have this definition
of ultra-processed foods that includes a lot of foods that are not particularly bad for
you, and then you have this definition of unprocessed foods that includes a ton of foods
that are bad for you, or, like, at least they're calorie-dense, energy-dense.
I was thinking, because he includes milk in this sort of unprocessed category, like,
a creme brulee would count as, like, unprocessed.
Even though it's extremely calorie-dense, it's still mostly cream, right?
Yeah, and just so very similar ingredients-wise to, like, ice cream.
Ice cream always makes the list of ultra-processed foods, but, like, I looked this up.
Haagen-Dazs ice cream has five ingredients.
It's, like, cream, sugar, vanilla.
There's nothing you can't pronounce in there.
As a person who occasionally makes ice cream, there's not much to. But then the second problem with this definition is that it includes these concepts that are
just not related to human nutrition.
So he goes into this whole thing that the real problem with ultra-processed foods is
that they're profit-maximizing.
They're produced by large corporations.
They're these kind of international commodities.
Ah, yes, more vibes.
Exactly.
So he says,
Ultra-processed products are typically branded, distributed internationally and globally, heavily
advertised and marketed.
And very profitable.
But the problem with this is that fucking, like, fruits and vegetables and food that
is good for you is also very profitable.
And also produced by fucking international global corporations.
Like, if you go to the grocery store and get strawberries, they're going to be from
fucking Driscoll's.
Driscoll's is, like, a massive corporation.
I mean, I think here's the interesting thing here.
There is a critique to be had about the behavior of any number of multinational corporations.
That criticism, of course, is very profitable.
Corporate behavior isn't the same thing as proving that there are negative health effects.
effects as a result of that bad corporate behavior. Again, they're trying to kind of
ride the coattails of like, this kind of makes sense to you, right? Yeah. You kind of know that
corporations are like bad. So they're probably also bad for your health, right? We found this
in the Michael Pollan book too, that people keep presenting these dietary choices as somehow like
a break from capitalism or somehow virtuous in all of these other larger economic ways. And they
just aren't. Food can be healthy and produced by miserable corporations. This is the way that
we've chosen to structure our economy. You cannot escape from this by buying virtuous food. I think
this is a huge mistake in the way that people frame this stuff. And if you can, then the escape
is only an escape that is available to people who can afford it. Exactly. Maybe the push then should
be, A, we first have to establish that there is hard and fast evidence that this is like actively,
uniquely bad for you. And B,
then I think the task becomes, then you like regulate healthier products.
So as we just covered, like this, this definition is like not all that useful. I think this paper
is like actually quite bad, like kind of shockingly bad considering it like began
this entire field, like just obvious contradictions. You know that I love like a petty,
like academic paper, Aubrey, you know, I love like peer reviewed, like, hmm, interesting.
You and I both love the Big Brother house.
I love this aspect of academia. Absolutely.
So I found an article on all of the ways that they had to change the definition of this term
over time. Between 2009 and 2017, they changed the definition of ultra processed foods seven times.
Yeah, that tracks.
And there's this article called Ultra Processed Foods, Definitions and Policy Issues by Michael
J. Gibney that follows all of these changes in like a super petty, but also very useful way.
Oh, it's our weight.
Weight Watchers episode, you're the 17 different diets that Weight Watchers has been.
So in 2010, the definition of ultra processed foods is updated to durable, accessible, convenient and
palatable, ready to eat or ready to heat food products liable to be consumed as snacks or
desserts or to replace home prepared dishes.
I like that they keep throwing in highly palatable, which is just like if it tastes good, it's one of these.
The other like the first thing that jumped out to me about this the first time I read it is this
ready to eat thing was like these are often ready to eat. But like, do you know what else is ready
to eat? A fucking apple?
Totally. And some of that is like a grilled chicken breast that's cut up and thrown in a
package at the grocery store. And then you pick up. Right. So like to refer to a food like that
while conjuring an image of just like a heap of like hostess cupcakes and Cheetos feels misleading
in a way that really.
Verges on deliberate here.
There's also the thing, you know, it says it says they're they're intended to replace home prepared dishes.
But also, this is not a biological concept. The purpose of making food does not affect your body differently.
If I'm eating a brownie to replace a meal that doesn't make the brownie like affect my body differently.
It's like, again, we're just throwing in these concepts that are not actually related to nutrition.
At least let's just be honest about what we're grappling with.
Exactly.
You already know which foods it is.
It's the foods you already don't trust.
Right.
And you already know who eats those foods and it's people who probably make less money than you do.
We then in 2012 get another update where older processed foods are defined as these are formulated mostly or entirely from ingredients and typically contain no whole foods.
So this is yet another like message that you see in this world, even in like academic articles.
It's like they're not even food.
They're like edible food like substances.
Right. This is the Frank and food.
Yeah, I'm sorry.
But like a Doritos.
Doritos is mostly corn.
I'm sorry.
Yeah, I mean, to your point earlier about lays, another one of those is Fritos where you're like, oh, it's just corn and oil and salt.
So, OK, so finally, we finally this is the whole episode, Aubrey, just walking through technical definitions, walking through definitions.
These efforts go on for like a decade to, like, try to come up with a classification.
They finally in 2017 come up with what's called the Nova classification, which is now what is used in all of the research that we do in the United States.
the NOVA classification, which is now what is used in all of the studies. And from three groups,
they've now made it four groups. There was a period where they're like 3A and 3B or whatever,
but now they're just like, fuck it, there's four groups. So I'm going to send you a JPEG
of like the current definitions and some examples. Group one is unprocessed or minimally processed
foods, naturally occurring foods with no added salt, sugar, oils, or fats. Group two is processed
culinary ingredients. Group three is processed foods defined as food products made by adding
sugar, oil, and or salt to create simple products from unprocessed or minimally processed foods
with increased shelf life or enhanced taste. And then the last one is like a brick.
Yeah. And that is the definition of ultra processed foods. Industrially created food
products created with the addition of multiple ingredients that may include some
group two ingredients, as well as additives to enhance the taste and or convenience of the
product, such as hydrolyzed proteins, soy protein isolate, maltodextrin, high fructose corn syrup,
stabilizers, flavor enhancers, non-sugar sweeteners, and processing aids, such as stabilizers
and bulking and anti-bulking agents. They're industrially created food products
created with the addition of multiple ingredients to enhance taste and or convenience.
The idea is that they're high fructose corn syrup, stabilizers, flavor enhancers, non-sugar sweeteners, and processing aids, such as stabilizers and bulking and anti-bulking agents.
The examples here are commercially produced breads, rolls, cakes, cookies, donuts, breakfast cereals,
soy burgers, flavored yogurts, ready-to-heat meals, such as frozen pizzas, soft drinks, and candy.
Soft drinks are not ready to heat. I know it's such a weird order. The order that they're doing
it in is weird. The people who are doing this defining are not writers. I'll say that. I think
the greatest challenge that they come up with is this thing of there's processed foods, which are
fine, and then there's ultra-processed foods, which are bad. This is like, I think, what they spent 10
years kind of trying to figure out, because obviously everything is processed. And there's
stuff like cheese, which is produced in like a very processing kind of process. God damn it.
But they don't want to call that bad for you, because that's kind of traditional or kind of
virtuous, I guess. So that's in like group three. Yeah, it just feels like so clearly such a
line-drawing exercise around like, how do I keep in the things I like and cut out the things I don't.
There's also the one that really stuck out to me the first time I saw this was
in group three, which again is good, you have freshly made bread. And then in group four,
which is bad, you have commercially produced bread. Again, these are not nutritional concepts.
Something can be made in very large batches and also be very good for you. And the other way around,
and like, at what point does bread become commercially produced? On some level,
all fucking bread is commercially produced. I bought it at the bakery.
Well, also group four talks about like high fructose corn syrup,
but group two includes honey and maple syrup. Yeah, exactly.
So what is the metabolic difference? It feels like they're trying to have like
a hundred sort of like scientific conversations at once. And I'm like,
no dudes, you got to go through beat by beat and be like, here's the problem with emulsifiers and
why they don't work. And I'm like, no dudes, you got to go through beat by beat and be like,
they might be bad for your health. Here's the evidence for that. Here's why honey is different
than high fructose corn syrup. It isn't. Also, Aubrey, no one, even like in academia can,
can fucking agree on what the four groups are. I have seen honey in all four groups.
Good. Yes. No one can decide. This is when I turn into that like Elmo in front of flames. Like,
yeah, there's also, I mean, maybe this is me being annoying, but like, I also,
I also kind of object to like cakes and cookies being an ultra processed because like, yeah,
some cakes and cookies are ultra processed, but some cakes and cookies you bake at home with like
five ingredients. And surely the whole point of a fucking processing scale is to organize foods
according to how processed they are, like the processes by which they are made. You just have
like all cakes and all cookies are in here, presumably because they're very high in fat and
high in sugar. But then if we're just putting in all foods that are high in fat and high in sugar,
then why isn't this just the fucking, how high are foods in fat and sugar scale?
You could also argue that like, while they've got like cookies in group four,
that if you're talking about macarons, those are made with ground up almonds instead of wheat
flour. So does that mean that they're sugar nuts? They're really trying to put a real fine point on
it, but in the process of so doing, they are revealing how blunt that point is.
I could yell that on the internet for saying this the other day, but like,
there's also the thing of like ultra processed foods,
are characterized by the addition of multiple ingredients. And then they list like maltodextrin
and all this kind of stuff. But am I losing my mind, Aubrey? Ingredients are not the same as
processing. Like if I make bread with like water, flour, yeast, and cyanide, that's not bad because
it's processed. Like the process of making that is precisely the same as if it wasn't poisonous.
The reason it's poisonous is because of the ingredient. None of this stuff is processed.
It's like, if the ingredients are bad, then it's bad for you. But then if you're making
the whole, the original article that kicked all this off was like, it's not what's in the food,
it's the process. But then they define it and it's like, oh, so it is what's in the food.
It really mimics the kind of way that I feel myself behaving when I'm looking for like
shampoo or something. And the container will say like, no parabens and no phthalates. And I'm like,
I don't know what those things are, but it seems good.
Yeah, they don't have them. And you're like sort of creating this weird, deliberate Byzantine definition that carves out all the things that you trust and leaves in all the things that you don't trust.
So, OK, so that was the sort of decade long and I think unsuccessful effort to define what this term means.
We then in 2019 get the first evidence that this category of food is uniquely bad.
So this comes from a researcher named Kevin Hall, who was previously a physicist, but sort of drifted into diet research.
He was the guy that wrote the Biggest Loser study, the study that found that like their metabolisms were still hella slow, like years after they were on the Biggest Loser.
He, in 2015, meets Carlos Montero at a conference and Montero is like, you're looking at this the wrong way.
You shouldn't be looking at nutrients. You should be looking at processing.
According to the lore, he's like.
I don't really buy this. I don't I don't know about this whole ultra process thing.
I'm going to design a study to disprove this concept.
And then he like accidentally ends up proving the concept.
I feel like what you're ramping up for is like what I was ramping up for when I was like Richard Simmons says he got a book deal by sitting next to someone on a plane.
Yeah, I don't have concrete evidence to be like, no, that definitely didn't happen.
But I'm going to go out on a limb and be like, that really didn't happen.
So the way that he does this is he gets a grant.
He gets a grant from the NIH to basically take 20 people and like lock them in a room, not really, but like metaphorically and monitor their diets.
And so what he does is he gives them for two weeks a unprocessed diet to like completely whole foods.
And then for the next two weeks, he gives them a ultra processed diet and he switches this to like 10 people start with unprocessed and then go to processed 10 people start with processed and then go to unprocessed.
So that way he's like flipping them around.
They're given this food.
They're given this food and they have 60 minutes to eat as much of it as they want.
And then when they're done, the researchers take it and they weigh it to see exactly like gram by gram exactly how much of it did they eat.
So that way they can measure their intake.
And then, of course, there's like a ton of tests at the beginning and at the end.
You and I have talked about sort of like there are a couple of ways to do nutrition research.
And one is like in a lab in a vacuum.
Yes.
It gets you much more limited in scope kind of data or you can go sort of larger scale, more longitudinal.
But that's usually dependent.
That's usually dependent on self reports and people sort of like adhering based on the honor code.
Yes.
So much of what I've heard about processed foods is about long term health effects.
Aubrey, are you saying you can't measure the long term effect of lifestyle on health in two weeks with 20 people?
I, Aubrey, I don't know.
Mike, I'm not a scientist.
Have you co-hosted this show before?
I don't know.
I don't know, baby.
I don't know.
Let me just make you read the description of the results.
This is from a New Yorker article by Dhruv Kular.
When participants were on the ultra processed diet, they ate 500 calories more per day and put on an average of two pounds.
They ate meals faster.
Their bodies secreted more insulin.
Their blood contained more glucose.
When participants were on the minimally processed diet, they lost about two pounds.
Researchers observed a rise in levels of an appetite suppressing hormone and a decline in one that makes us feel fuller.
So this is very decisive.
It's like people who ate ultra processed foods gained a bunch of weight.
They ate more.
All of these markers got worse.
The unprocessed people, they did great.
They lost weight.
They felt awesome.
This study, when it comes out, is like, it's wild how popular the study was.
The study has been cited 1,200 times.
Yeah.
And I don't know.
This feels sort of like the glycemic index all over again, which is like a teeny tiny group of people have a specific response to a food.
And that then somehow becomes like conventional wisdom in really short order.
This study is so much worse than just the fact that it was two weeks.
So the whole kind of point of a study like this is to hold everything else constant and only look at the effect of, quote unquote, processing.
But then if you read the fucking text of the study, that was not remotely true.
The ultra processed diet had twice the energy density of the unprocessed diet.
It had twice the saturated fat and it had 1.5 times more sugar.
So these are not equivalent diets at the most basic level.
And this is like in the fucking study.
You're like one group had a green salad and the other one had like a value meal from Wendy's.
And the ones who had a value meal from Wendy's gained weight.
Would you believe it?
Aubrey, Aubrey, Aubrey.
Oh, no.
Is it going to be a fucking biggie size frosty?
Is that what we're about to talk about?
The supplementary material of this study includes.
The daily menu.
So for every day, it includes specifically what they ate for breakfast, lunch and dinner with photos.
Go Gerd.
I am about to send you.
Pudding packs.
We're going to do day two dinner.
Unprocessed menu.
Day two dinner.
Stir fried beef tender roast with broccoli, onions, sweet peppers, ginger, garlic and olive oil.
Basmati rice, orange slices, pecan halves and salt and pepper.
It's like a nice dinner of like, I guess, essentially like a stir fry.
Sautéed vegetables, sautéed beef.
It looks nice, right?
Sure.
And then we have day two processed.
What?
What are you talking about?
Just the visual.
Just the visual is so fucking funny.
It is two whole chicken salad sandwiches.
For dinner.
On white bread.
Dinner!
A cup that appears to be an entire can of canned peaches in heavy syrup.
In heavy syrup.
You get two Keebler shortbread cookies and four Fig Newtons.
And then you get five crystal lights with fiber added.
Even in my darkest days of like 80s, 90s, low fat fucking dieting.
I did not get through five crystal lights in one day.
This is actually the reason why the energy density is so different between the two diets is because I think.
I think in an effort to hold the fiber constant.
There's no fiber in ultra-processed foods.
It's like one of the things that makes them ultra-processed foods.
So the only way to get participants fiber was to basically give them sodas every day with like fiber supplements in them.
So these are diet lemonade, but oftentimes it's just like juice or like a little smoothie or milkshake, something like that.
But like there are drinks with every meal for the ultra-processed people.
There are no drinks for the unprocessed meal.
Every once in a while they get a milk or something, but like they're not getting.
Like diet sodas or anything.
So that's a, that's a huge difference between the two diets.
If you were sitting down to make yourself a meal, the chances that you, that like most people would make two whole sandwiches and eat an entire can of peach.
Like it just is, it's not representative of like how people eat.
Well, also the thing that really stuck out to me is that there are three desserts with this meal.
There are cookies.
There are fig Newtons.
And there's.
A can of peaches in syrup.
Yeah.
Almost every single meal of the ultra-processed comes with like cookies or shortbread or like some sort of like pudding.
There are no desserts with any of the unprocessed meals.
Yeah.
The other like really striking thing about this is that they're not the same meal.
They're completely different.
If you want to do a one-to-one on your ultra-processed, you get the like, I don't know, Stouffer's version of like beef and broccoli.
Exactly.
Let's go head to head with similar dishes.
This is the thing.
It's like what they're actually fucking doing there.
They're calling this a test of like our ultra-processed foods worse for you.
But it's literally, it's like you give one group of people salads.
It's like a lot of salads.
You give another group of people fucking cookies and they're like, oh my God, the people ate more cookies.
Therefore, ultra-processed foods are bad for you.
Right.
You gave them six cookies with every meal.
Yeah.
I actually think there's like a huge missed opportunity here because something people always talk about in this field is that like, well,
pizza isn't necessarily bad for you, right?
If it's a frozen pizza from the grocery outlet, then it's bad for you.
But if it's like artisanal and there's like three ingredients in the dough and it's like lovingly made, then it is good for you, right?
It doesn't have to be bad.
Yeah.
So why didn't you fucking test that hypothesis?
Can we look at their final meal?
The like the goodbye meal?
The farewell.
Is that it?
Sorry.
I have so many files called supplementary material.
I have no doubt.
Oh, there it is.
Day seven dinner.
It was only seven days.
I thought it was 14.
I think they must have repeated.
Oh, they repeated.
Yeah, yeah, yeah, yeah, yeah.
Okay.
The ultra-processed menu for day seven dinner is so bad.
Also, again, there's fucking two desserts is made for a child.
Yeah, it really is.
All of them are.
It is two PB&Js that are packed to the gills.
Yeah, they really are like overflowing.
Two cups of 2% milk with fiber added.
Woof.
Horrible.
And then you get a snack pack of chocolate pudding, graham crackers, baked Cheetos.
That's the way you disappoint everyone.
They're the color of like glow sticks at a rave.
They're the color of delicious.
I hate Cheetos, dude.
Oh my God.
I love dude anything with powdered cheese.
Anything with powdered cheese.
I love it.
♪ I love it so much ♪
- There's these long sections of these articles
where they're like, people can't stop eating
doritos and i'm like really day seven dinner unprocessed menu what you're seeing is a pretty
sizable bowl of pasta it looks like a salad with a side salad it does this is my nightmare aubrey
this is it this is where i flip over the table also with a side salad of green leaf lettuce
baby carrots and broccoli can't have too much salad apparently god it's raw broccoli too
wow i wonder why people ate 500 fewer calories wow we give them the most boring food imaginable
they're not listing the giant bowl of grapes you gluttons i guess that's the dessert it seems
visually like there's an implication here like if you weren't having two cookies you would be
eating a bowl of grapes and i'm like i just don't think that's how people think and eat but also if
the title of the study was like people eat more cookies than grapes i'd be like yeah
i don't know that this says anything about processed versus unprocessed foods these are
different foods but listen if you sort of scrape off this top layer of like sort of window dressing
kind of stuff around like we're actually concerned about long-term health conditions we're actually
concerned about blah blah blah most of those things are things like diabetes like heart disease and
things that we associate with fat people so i think part of what you're seeing here is an assumption
about how fat people eat
and how poor people eat okay so that was the experimental study that was that was the attempt
to prove that ultra processed food is bad for you like in a lab we then of course get a huge
wave of observational studies you can look up on like google scholar there are dozens of studies
that measure ultra processed foods versus non-ultra processed foods and like they all basically find
the same thing it's like higher rates of cancer higher rates of cardiovascular disease like it's
all the same thing and then you get a huge wave of observational studies and then you get a huge
wave of stuff that you would expect this is sort of the second way that you can measure the effect
of food on health it's like you take these these big studies of like hundreds of thousands of people
you give people food frequency questionnaires how often are you eating something oftentimes they'll
do this in two ways at the same time they'll be like how often do you eat these foods in general
and they'll also do a 24-hour recall like what did you do yesterday this is like kind of as good as it
gets although people are so bad at estimating what they're eating and like especially the amounts
right like if you if you go to a restaurant and you're like oh my god i'm gonna eat this
you have like pad thai can you say how many ounces you ate so there's that sort of layer of just
gathering the basic information but then on top of that researchers will then go in and they will
code people's answers for ultra processed food so they get these answers this is what i eat i ate
cake yesterday cookies yesterday whatever and then researchers will go in and go aha cake is
ultra processed so this person is yes eating ultra processed food so there's two layers of errors with
this and the biggest thing with this is that they're not fucking measuring whether people are
eating ultra processed food they're just having these food categories so again fucking cake cake
can either be ultra processed or not ultra processed it depends on the fucking cake well
and also again like i wonder about like how are they coding things like tofu exactly we've seen
now multiple ways that processed and ultra processed foods are categorized and we've already
sort of explored that like
reasonable minds can differ right that like two people could in good faith put the same thing
in like any of the four different categories or two of the four categories or whatever right and
they do some of the studies do actually attempt to control for that they'll have blinded uh like
one researcher will do it and then another researcher will also do it like independently
and they'll say like okay we have 95 agreement they're attempting to control for this but then
what the the real problem is that it's not actually the
coders it's the actual designers of the research they all say like oh we use the nova classification
system but if you read studies different studies have like different classifications so like we
mentioned honey before shows up in all different categories i also notice alcohol some studies just
like remove it all together they're like we're not looking at alcohol consumption some studies
will put it as like not ultra processed some studies will put it as ultra processed i also
found one that put wine and beer as not ultra processed but like vodka as ultra
processed and i also found one that put wine and beer as not ultra processed but like vodka as ultra
processed mike it's a potatoes it's the carbs the same study also put it was bread was not ultra
processed but pretzels were ultra processed when you put it in a shape that's processing mike the
other one that really bugs me is like hamburgers are always in the ultra processed category but
like i look this up a mcdonald's hamburger is 100 beef it's beef it doesn't have a bunch of
weird ingredients in it do you think there may be counting on like buns and american cheese and
ketchup and all of that kind of stuff well that's the thing
is like technically yeah you could put it in there but you again it could be ultra processed or it
could not be like everything fucking else like the cookies and the cakes and the pizza like pizza is
always in ultra processed as well but like it kind of matters for your whole thesis whether it's like
frozen pizza or like homemade artisanal whatever quote-unquote nice pizza has anyone hazarded a
guess at what the mechanism is here yeah this is this is something that you find in like the
as a research field, we're actually missing a crucial component and we're kind of leapfrogging
over this because we thought it was saturated fat. Then we thought it was sugar. Now we think
it's processing, but no one can agree on what the fuck processing is. There's also, Aubrey,
I wrote down like nine other problems with these studies. I'm going to try to go through them
very quickly. I know you were talking a big game about we're going to record for two hours. I know.
I'll tell you what, I'm looking at that ticker. We're at one hour 54. How's it coming?
Well, we're on page 40 of 91. Another problem with these studies is they don't distinguish
between different types of ultra processed food. Oftentimes it's just this weird binary
distinction between like ultra processed food and everything else. So all three of the first
three categories are just like good and ultra processed is bad. But there's a couple of studies
that actually look at different categories of ultra processed food. They're like, okay,
breakfast cereal, candy bars, various other things. In this study that looked at 10 categories of
ultra processed foods, the only one that looked at 10 categories of ultra processed foods,
that showed a clear and consistent association with worse disease was soda, processed meats,
and alcohol. All the other ones like cookies, refined bread, all this other stuff. It was like
too mixed to really say anything. But even within those, right? Like if we're talking about breakfast
cereals, my guess is that grape nuts is going to have a different health effect than like lucky
charms. All of this stuff breaks down once you try to get granular. Yeah. That's kind of what I'm
saying. You've got the entire category of sodas. I think there are probably a lot of people out
there drinking like poppy and olipop and all of the like probiotic sodas thinking that that's a
different thing. So, and the final thing I want to mention is the lack of a dose response. So the way
that they do these studies is they compare the people who eat the least ultra processed foods
to people who eat the most ultra processed foods. And it's like a really wide gap. Like some people
are eating like 60% ultra processed foods and some people are eating like 7%. When you compare
the least versus the most, you do get these like pretty large effects. However, there's some
studies actually list the effect for each of the quintiles in between. And there's something weird
that like the death risk actually goes down sometimes if you eat more ultra processed foods.
Okay. You heard it here first, team.
A real effect should have a dose response. Like a little bit of ultra processed foods is a little
bad for you. A lot is a lot bad for you. But we don't find that in the results. One of the papers
found a 50% higher cancer risk.
If you're eating a ton of ultra processed foods, but then once they adjusted it for the dose
response, they only found a 5% difference. Whoa. Some people, if you eat a little bit
of ultra processed foods, you're actually less likely to get cancer. That's something that never
comes up. I mean, I don't think this is causal, right? And also it's based on these fucking food
frequency questionnaires. So who knows? But it's like, to the extent that we can give diet advice,
which we all know everybody's going to give diet advice on the basis of these fucking correlational
studies. To the extent we can give diet advice, it's like, well, yeah, if you're not eating any
processed foods, you should start eating some because those people actually have a lower risk
of dying. Well, this is sort of like the, like for seniors, it can be more beneficial on a number of
health fronts to be in the overweight category versus the quote unquote healthy weight category.
Right. But you're not seeing that as like health guidance for folks, right? Because like this,
we already have some sort of cultural conclusions drawn, right? Ultra processed foods are Cheetos
and candy bars, and those are bad for you and you shouldn't eat them. This is maybe more
damning than I mean it to be. But like, it feels like it's sort of masquerading as science.
This is what I mean with this, like, is this a scientific term? Or is this just like a thing
people say? Yeah, because I don't really mind if people say processed food. But if we're gonna have
a scientific term, we should have clear consistency about what is in that category and what is not in
that category. You don't read biology papers that like can't agree on what a mammal is. Yeah. Like
in general, that's like a pretty fixed category. For this, it's like, sorry, bread, we can't decide
where bread goes. I would argue that honey is processed by bees. It's flowers processed by
bees. If it's animal process, then it's fine. I mean, I guess milk is processed by cows. Maybe
we're onto something, Aubrey. Let's publish. So this brings us to the massive mainstreaming of
this term in 2023, when a guy named Chris Van Tulliken comes out with a book called Ultra Processed People. Why do we all
eat stuff that isn't food, and why can't we stop?
As soon as it came out, we got
So many episode requests for it.
So many episode requests.
So Chris Ventelekin is a professor at my alma mater, UCL.
Do you know what UCL stands for?
University College of London?
It's the worst name of a university in the whole fucking world.
University College?
Guys.
That's really funny.
Yesterday I had lunch at Food Restaurant.
Listen, I went to a school called Portland State.
Oh, Portland's not a state?
Do they know that?
Correct.
Do they know that it's not a state?
I know.
Oh, no.
Also, you went to Brown.
Why are you pretending you went to a different school?
I went to two years of Portland State and two years of Brown.
No, I do know this.
I just like reminding listeners that you went to Brown because you hate it.
Damn it.
Fucking shit.
Any excuse.
Now you're going to leave all this shit in too.
So the thing is, we're not going to go super duper into this book, mostly because I already
have a podcast that does that.
I can't just do fucking books all the time.
The book, honestly, I've read worse from British TV presenters.
As I was going, I would sort of double check things.
And most factually, it mostly checks out.
You don't catch him saying anything completely false.
But I think the core problem of the book is that this concept of ultra-processed food
just does not hold up to 300 pages of discourse.
I think throughout the book, you keep getting this sense that the ultra-processed concept,
that is not really helping us understand anything.
So he has a whole section about climate change, that like the way that we're eating is like
really bad for the climate, which is absolutely true.
And then he says like, well, ultra-processed foods are driving climate impacts.
And I was like, are they though?
I went to the various NGOs that like rankings of like foods that are the worst for the climate.
And so the top 10 foods that have the worst climate impacts are beef, lamb, cheese, cow's
milk, kind of like dairy products generally.
Chocolate, coffee, shrimp.
Palm oil, pork, and chicken.
Oh, shrimp.
And Chris Ventilican like admits this.
He's like, well, you know, these aren't necessarily ultra-processed foods, but they're part of
like this ultra-processed food system.
And he sort of tries to like make that work.
But it's like, if you want to reduce your climate impacts, you wouldn't stop eating
ultra-processed food.
You would stop eating meat.
Like meat is like catastrophically bad for the climate, especially cows.
Anything involving cows is really bad.
Well, and you could argue just as much if you're saying like,
beef is part of the problem.
Imported beef is also a big part of the like fine dining landscape.
This is the thing is he's constantly straddling ultra-processed and unprocessed.
Because you can eat a steak, which is unprocessed, but that's terrible for the planet.
Even worse if it's like Wagyu from Japan.
Yeah, like flown in, frozen.
It's just, it's like, I don't like over and over again in the book, you're like, this
is interesting as like a critique.
Of the food system.
But processing isn't like a very good entry point to this.
He also has a whole section about how ultra-processed food is addictive.
So I'm going to send this to you.
Nicole Avena is an associate professor at Mount Sinai in New York and a visiting professor
at Princeton.
Her research focuses on food addiction and obesity.
She told me how ultra-processed foods, especially products with particular combinations of
salt, fat, sugar, and protein.
Can drive our ancient evolved systems for wanting quote, some ultra-processed foods
may activate the brain reward system in a way that is similar to what happens when people
use drugs like alcohol or even nicotine or morphine.
The neuroscience is persuasive if still in its early stages, there is a growing body
of brain scan data showing that energy dense, hyper palatable food ultra-processed, but
probably also something.
A really good chef might be able to make can stimulate changes in many of the same brain
circuits and structures affected by addictive drugs.
Is this just pleasure?
Yeah, this is.
Are you just experiencing pleasure?
I read a really good paper on this called a food addiction, a valid concept where like
it was basically a debate.
Like here's the case for food addiction as a real thing.
And here's the case against food addiction as a real thing.
And like, again, there's, there's a colloquial definition of food addiction where people
are like, I'm addicted.
I'm addicted to chocolate.
Like the authors are actually very like compassionate about this and are like, if that helps you,
that makes sense.
Like the way that people talk about it colloquially is fine.
However, as a scientific concept, the term addiction means something specific in like
brain science.
And we don't actually have good data on that for food.
I think that there are pitfalls to the ways that people talk about it colloquially because
there is a point at which it stops being your own internal lens and starts being a lens
that you apply to other people.
Yeah, yeah, yeah, yeah.
It also turns into like scrutinizing other people's eating and eating habits through
the lens that works for you.
Right.
Right.
I don't think that it's like totally unproblematic how people talk about it colloquially, but
agreed that like the research should have a higher threshold than that.
Yeah, exactly.
And a lot of it basically is based on these functional MRI studies where like they show
you pictures of food or you eat food and like you can see different parts of your brain
light up as you do that.
And so we always get these studies that it's like, it lights up the same part of your brain
as cocaine, but like, yeah, that's just like the, I'm happy part of your brain.
Like this, this is the same part of your brain that lights up when like you see your best
friend.
We talked about this with like the idea of quote unquote sugar addiction or sugar episode,
right?
That like, yeah, dude, you get that when you eat like a chocolate bar, but you also get
it when you pet your dog.
It's also very different person to person, like which part of your brain lights up.
It's not as easy to say.
It's like, oh, the cocaine part.
Like you're touching the cocaine.
Part of your brain.
It's just like, that's like the happy part.
And it's very different for people.
It's not really, it's not like a mature enough science to say that this exists.
And then the other kind of category of evidence for food addiction is rat studies.
Oh, your favorite.
You can't really do rat studies on ultra processed foods because rat, like they feed rats like
little pellets of like specific formulations, right?
Of like it's 40% carbohydrates and 20% protein.
So like that's basically as processed as it comes.
You're making like a slurry and then.
Flying it into pellets and feeding it to rats.
So all rat food is like equally processed, like as processed as it can possibly be.
There is something there.
There's studies where they feed.
This is literally what it's called.
They feed rats sweet fat chow, which is like a specific kind of chow.
And then they measure like what they do.
I'm like, there's some evidence, but also most of the rat study work is on sugar addiction
and sugar addiction, as we talked about, is like very disputed in the literature.
And it's just like not clear that it exists.
Hang on.
I got to go on Etsy and find a like a potter to make me a cookie jar with a label that
just says sweet fat chow.
I know.
I love these little studies.
Where's my sweet fat chow?
At a very basic level, it's sort of indicative, this sort of stuff.
But it's it's very we're we're very far from like kind of proving that food is addictive.
And we're also very far from proving that ultra processed food is specifically addictive.
It is sort of.
It feels like a frustrating thing when we do cover concepts like these, that like the
assumption from jump is that this has to be a biological reality and that culture plays
little or no role in how all of this stuff, you know, sort of gets metabolized by people.
It also brings us back to the definitional problem, because there's actually a study
by Nicole Avena, this this researcher that he's quoting here, where it's just like a
qualitative survey.
They just asked people like, what food are you most, quote unquote, addicted to?
Like, what are the what are the foods that you feel out of control around?
And the number one answer beans, my bean shell, I'm clawing my bean shelf all the time.
That's only you, Aubrey.
And if you want to talk about it like that, that's fine.
But scientifically, the bean shelf is not in the right.
Listen, get back at me when you see me at 2 a.m.
in the kitchen, just chomping down on dried beans.
But the the top five foods that people feel addicted to are chocolate, ice cream, French
fries, pizza and cookies.
Most of these are not ultra processed.
Like another thing that really bugs me about this ultra processed food research is that
it always includes fucking chocolate and like any you pick up any almost any like milk chocolate,
basic milk chocolate bar at the store.
And it has like five ingredients.
Like I looked at Ghirardelli, it's unsweetened chocolate, cane sugar, cocoa butter, vanilla
extract and soy lecithin.
And the only sort of frankenfood ingredient in there is soy lecithin.
Like are there health effects of soy lecithin?
Well, exactly.
Then it's sort of like we're back to this issue of like, what's the mechanism here?
Because are we saying soy lecithin is addictive in food or harmful?
Because soy lecithin is in a shitload of foods.
It's in like salad dressings, bread, et cetera.
Those foods aren't addictive the way that chocolate is, right?
People don't have the same relationship with those foods that they have with chocolate.
So it's like, sorry, what is this theory?
Is it that soy lecithin is bad or is it that like, well, chocolate is an ultra processed
food because it's high in sugar and high in fat.
If it's ultra processed because it's high in sugar and high in fat, then ultra process
isn't doing anything for us.
Right.
I mean, like if you're going to take aim at like stabilizers and emulsifiers, uh-oh, green
juice.
Right.
Because if you don't put something in the green juice, it separates and then you end
up with like yellow liquid and green silt in a bottle on the shelf and nobody's buying
that shit, right?
Yeah.
Another emulsifier is when you put a little bit of mustard in your vinaigrette.
right right you can sort of give all of these things more sort of nefarious sounding names or
whatever more complicated names but like that doesn't actually establish the case make the
case that they are harmful to your health i i feel like there's there's this systematic lack
of precision because i'm actually open to the idea that like there's stuff in food that is harming us
and like i don't love the fact that there's like weird fucking like hormones and the beef and shit
like i don't love the the artificialness of our food supply however like i would much rather that
conversation be led by actual scientists who know like the dosages that are shown to be harmful and
the ways in which it is harmful like we need actual evidence for these things we can't just
say like there's chemicals in the food because like baking soda is a is a white powder that you
add to bread it's in everything is that bad for us well and again we're throwing all of this stuff
in the same bucket right and if you sort of chase down each one of these things you're going to
these ingredients individually some of them may have some mixed scientific evidence some of it may
have none right we're just shunting so many things into this sort of giant bucket labeled ultra
processed foods yeah i think i mean this also sort of brings us back to his own problems with
defining the term because throughout the book the definition of this term changes a bunch of times
he starts out by saying that an ultra processed food is any food with any ingredient that like
you wouldn't find in a standard home food and that's what he's trying to do he's trying to
it doesn't matter the amount of that ingredient it doesn't matter sort of like some of these
ingredients there's like things you haven't heard of because like you're not a chemist well and also
some of them are like the chemical names for shit you already know the gimmick of the book is he's
doing a supersize me thing where he's like for 30 days i'm gonna only eat ultra processed food
and of course he like gains a bunch of weight and he feels worse and he says his like mri is
different whatever well yeah he's eating two pb and j's and a half a pack of gram crackers for
every meal again it's it's just very hard to separate this from like the
actual contents of the food but so he has this section as my diet went on i became obsessed with
what is and isn't ultra processed food so did everyone around me friends started sending me
ingredients lists does fruit concentrate means this is ultra processed food yes it does by the
way to reiterate that means one ingredient if it has one ingredient it's ultra processed and also
like fruit concentrate is just like boiled down fruit
you could also get fruit juice and boil it down yourself and make like a barbecue sauce or what
like i just like what sugar is i met b wilson at a food festival at which we spoke on a panel
together she's a food journalist and author who has written about ultra processed food
she asked whether i would classify baked beans as ultra processed food she didn't think that
they were canned baked beans comprising white beans in tomato sauce are a staple in the british
diet as wilson put it although they're obviously not the healthiest food in the world quote in the
context of so much else that's in the average diet there's quite a lot of real food in the can
this is true most of a tin of baked beans is actually beans and tomatoes so these are these
are back-to-back paragraphs by the way it's like if it has fruit concentrate in it one ingredient
means it's ultra processed but then as soon as we get to baked beans he's like well a lot of people
like them and yeah most of it's you know beans and
water sorry is this a scientific concept or not hang on i'm looking it up dude michael
would you like to know the ingredients to heinz baked beans oh i have it that's like the next
thing in my notes but read it read it read it water white beans tomato puree sugar salt
calcium chloride mustard onion powder paprika extract spices and garlic powder now sir
they're fucking ultra processed by your own definition you can't just say
oh well they're like a big part of like the british diet and it's important culturally and
it's mostly beans sorry what are we doing here it's if it's this qualitative where just anything
can sort of jump from this category to the other category then this is not a useful category for
scientific research well and if you're talking about like ingredients that you don't have in
your kitchen calcium chloride if you're right like tomato puree like i don't know guys i don't know
what is tomato paste if not a fruit concentrate this is like really this is not the end of the
book but this is like to me the culmination of like my engagement with the book because i got
so annoyed at this section so he's trying to eat a healthy diet while also doing ultra processed
food so he's like okay i can't just like cheat and like eat fucking cookies all the time so like i
need to look for some ultra processed food that isn't so bad he goes to sainsbury's which is like
the relatively high-end grocery store in the uk he gets a frozen lasagna but the problem with the
frozen lasagna is that it's all like normal ingredients it's just like wheat pasta sauce
there it doesn't count as ultra processed in his own definition but then he looks he goes to aldi
which is like the much cheaper grocery store and that one has a bunch of like additives and
emulsifiers and stuff and he's like okay so then he calls a member of carlos montero's team
to kind of ask about this like well is is lasagna then kind of ultra processed
and not ultra processed at the same time so here's sort of the answer
some products are not technically ultra processed food she explained but they use the same plastics
the same marketing and development processes and they're made by the same companies as ultra
processed food the additives are part of the definition but they are not the only problem
with the food some additives are harmless whereas others cause direct harms but in either case their
presence indicates that a product probably has lots of other properties that may cause harmful
effects
according to lusata the sainsbury's lasagna is not ultra processed food if you apply the
technical classification quote but these foods are like a fantasy they are not homemade foods
there is a very consistent like snobbishness throughout this book and i think this whole
concept you're basically looking at frozen lasagnas which meet all of the criteria you
say that you want right these are all these are whole foods they don't have too many ingredients
they don't have a bunch of chemicals in them and you're like oh my god i'm gonna eat this
like oh but they're still ultra processed because like they're not homemade people should be making
it at home again is this a scientific concept or not because like do we all want people to have
more time to make stuff at home yes fine whatever but it's like now we're just judging people for
like microwaving a dinner also just like you really could say hey some frozen foods are
actually not ultra processed yeah you could actually add some nuance and this appears to
be leaning away from that nuance and going no no it's frozen it's still bad
you didn't make it it's still bad also like i have made plenty of bad food yes my housemate and i
when i was in my 20s decided that we were gonna make cheese sticks at home and instead of using
breadcrumbs we used flaming hot cheetos that is a homemade meal i would argue it's maybe not
nutritionally our strongest effort but also again not nutritionally devoid of value right like
mozzarella cheese has like a bunch
of fat and protein in it that are like generally pretty good for you like you know what i mean like
there's like a bunch of stuff uh well i make the only thing i like ever like bake at home because
i'm really bad at baking is banana bread because it's like any dumb ass can make banana bread
banana bread is extremely bad for you it's really good but it's a fucking cake it's not like delicious
at one point in the book he actually says like well if something is like made with love then it
doesn't count as an older processed food i'm just like dude please have a fucking definition and
stick with the definition
man yeah i think increasingly as we talk about this the more i'm sort of in your camp of like
oh well then just say junk food because that is just a fucking junk food yeah it's not my favorite
term but it is more honest than being like actually there are these like extremely concrete health
effects that are like widespread for like every preservative that is ever used in foods right or
every ingredient that you can't pronounce what a deeply weird bar yeah i can't pronounce shit people
know it's just like all of our inbox is me not being able to pronounce stuff let's hope there's
not a denouement in your food york is technically ultra processed food at this point i i now have no
conclusion aubrey because all i had was the junk food thing we already talked about the junk food
thing oh sorry sorry sorry now i have no closing wait can i tell you a conclusion oh yeah what is
yours you were talking about pringles earlier and i remembered that there was a specific name for
the shape of pringles saddle saddle bags no michael it's the universe it's called a hyperbolic
parabola
paraboloid wait what uh it's mathematically known as a hyperbolic paraboloid put that on
the fucking labels and nobody will ever buy them again like i will give you a food that is that
uniform in color flavor texture and shape i'm like i won't fight you on that being ultra processed
yeah i mean this is the thing is i feel the need to reiterate that like both of us are like
relatively careful about how we eat and like i really do go out of my way to like try to
eat healthy and part of that is like avoiding like i don't know foods that should go bad but
don't go bad that's like one of my like little food rules i'm like if it should be perishable
and it's not perishable i probably don't want to eat it i don't know how like scientific that is
i think if people have food rules like this and they're kind of arbitrary or like kind of weird
like fine i don't really police other people obviously diet related disease is like is real
and is like something that we need to address but also we need to have scientific concepts if we're
going to have scientific concepts we need to have scientific concepts if we're going to have scientific
approaches to issues we're still so deeply in the process of discovering
about this stuff. But the stuff that takes off is the stuff that comports with our cultural ideas
of what is and isn't healthy, which are not the result of science, right? I just wish that we
were able to have a cultural conversation about the cultural stuff and a science conversation
about the science stuff. I think it's just worth being honest with ourselves that most of our sort
of like hard and fast thinking about what is and is not okay to eat comes much more from like a set
of assumptions and sort of a mismatch of like life influences. And also if it's working for you,
then keep doing it. And I'm not going to tell you not to. We're not going to tell you what to eat
or what not to eat. I am here to tell you not to eat hyperbolic paraboloids. I'm here to tell you
to eat them. Only hyperbolic paraboloids. Get the pizza flavored ones.
I'm here to tell you not to eat hyperbolic paraboloids. Get the pizza flavored ones.
Podcast Summary
Key Points:
The term "ultra-processed food" lacks a consistent scientific definition and is highly subjective, varying across studies and contexts.
Early academic efforts to define ultra-processed foods, like the Nova classification, show significant inconsistencies and contradictions over time.
The core argument—that ultra-processed foods are uniquely harmful—relies on flawed studies that compare vastly different diets, such as salads versus value meals, and fail to account for actual food variety or nutrition.
Observational studies often show weak or inconsistent links between ultra-processed foods and health outcomes, with no clear dose-response relationship.
Many foods labeled as ultra-processed (e.g., bread, sauces) are nutritionally similar to traditional foods, and the definition arbitrarily excludes or includes items based on political or cultural biases.
The term is often used as a scapegoat for poor health, misleadingly implying that processed foods are inherently bad when corporate production and traditional foods are equally profitable.
Studies frequently rely on self-reported data and coding errors, with researchers disagreeing on whether foods like honey, alcohol, or hamburgers fall into the category.
The concept has gained mainstream traction through books and policy, but lacks robust scientific grounding and fails to explain health impacts beyond anecdotal or oversimplified claims.
Summary:
The podcast critically examines the scientific validity of the term "ultra-processed food," revealing that it lacks a clear, consistent, or universally agreed-upon definition. Despite widespread use in public policy and health discourse, the classification is riddled with contradictions and arbitrary boundaries—such as including frozen pizza or bread while excluding cheese or honey. The Nova classification, introduced in 2017 as a scientific framework, still shows inconsistencies across studies and is often misapplied, leading to misleading conclusions.
, sugar, saturated fat) from unprocessed diets, but the comparison relies on artificial, unrepresentative meals (like multiple desserts) rather than real-world eating. Observational studies show mixed or weak associations with health outcomes, with no clear dose-response effect—meaning the harm isn't linear, and some groups actually show lower risks at lower consumption levels. Furthermore, the term often conflates food processing with health harm, ignoring that both traditional and industrial foods are produced by large corporations.
Critics argue that the concept functions more as a moral or political tool than a scientific one, diverting attention from actual nutritional content or systemic issues like meat consumption and climate impact. Ultimately, the podcast concludes that while ultra-processed foods may contribute to unhealthy diets, the term itself is poorly defined, inconsistently applied, and often used to simplify complex dietary and economic realities.
FAQs
Ultra-processed foods are industrially created products made from processed culinary ingredients, often with added salt, sugar, preservatives, and additives to enhance taste and convenience. They typically contain multiple ingredients and are designed to be ready-to-eat or ready-to-heat, with little resemblance to traditional, whole foods.
The NOVA classification divides foods into four groups: unprocessed, minimally processed, processed, and ultra-processed. Ultra-processed foods are defined as industrially created products with multiple ingredients, including additives like stabilizers, flavor enhancers, and high-fructose corn syrup, and are designed for convenience and palatability.
No. Not all processed foods are ultra-processed. Foods like fresh milk, olive oil, or minimally processed items like fresh bread or canned vegetables are processed but not considered ultra-processed. The distinction lies in the complexity and number of ingredients added during processing.
The term is controversial because it lacks a consistent scientific definition, with different studies using varying criteria. It also includes foods like breakfast cereals and snacks that may not be nutritionally harmful, while excluding healthy items like whole grains or traditional meals that are processed.
Observational studies consistently link high consumption of ultra-processed foods with increased risks of obesity, heart disease, and cancer. A key study by Kevin Hall found that participants on an ultra-processed diet consumed more calories, gained weight, and showed worse metabolic markers compared to those on a whole-food diet.
No. Most studies show a broad gap between low and high consumption, but lack a clear dose-response curve. Some studies even show reduced health risks at lower levels of consumption, suggesting the relationship may not be linear or causally straightforward.
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