Instant Genius - Busting social media diet and nutrition myths
Episode Date: March 31, 2024These days as many as 60 per cent of us are turning to the Internet or social media to get health advice. It’s a staggering number, especially when you consider the fact that literally anyone, regar...dless of their background or qualifications, can set up an account and start giving out lifestyle or dietary tips that can have a huge effect on our wellbeing. In this episode I speak to Dr Idz, an NHS doctor with a background in nutritional research. He’s has made it his mission to fight the misinformation doled out on social media and provide scientifically accurate health advice. In doing so, he has racked up almost 2 million followers on TikTok and almost 300k on Instagram. He tells us about some of the most common, and potentially dangerous, nutrition myths that abound on social media that he busts in his book Saturated Facts. Learn more about your ad choices. Visit podcastchoices.com/adchoices
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Hello and welcome to Instant Genius, a bite-sized masterclass in podcast form.
Each week you'll hear world-leading experts talking about the most fascinating ideas
in science and technology today. I'm Jason Goodyear, commissioning editor, BBC Science Focus.
These days as many as 60% of us are turning to the internet or social media to get health
advice. It's a staggering number, especially when you consider the fact that literally anyone,
regardless of the background or qualifications, can set up an account and start giving out lifestyle
or dietary tips that can have a huge effect on our well-being. In this episode, I speak to Dr. Itts,
an NHS doctor with a background in nutritional research. He's made it his mission to fight the
misinformation dolled out on social media and provide scientifically accurate health advice. In doing so,
he's racked up almost 2 million followers on TikTok and almost 300,000 on Instagram. He tells us about some of the
common and potentially dangerous nutrition myths that abound on social media that he busts in his book
Saturated Fats. So first off, welcome to the show. And can you tell us a bit about yourself,
you know, what's your background and what made you start doing TikTok videos? Yeah, of course.
No, thank you so much for having me. Yeah, I like this question a lot because, you know,
people are often a bit surprised as to kind of the journey that I've been on. Basically, I went to
medical school at the University of East Anglia and they have a very, you know, kind of
integrated, holistic style of doing medical school. They're not like a traditional style where you
have pre-clinical, just lectures, just, you know, pharmacology, just physiology. We kind of see everything
from the first week of the first year. And what that enabled me to do was kind of appreciate the
role that kind of dire, lifestyle, preventative medicine has on long-term health outcomes. And as I was
going through medical school, I had the great opportunity to take a break out of medical school.
and pursue another master's degree in nutritional research,
which were funded by the university itself as well.
And then I came back to finish my medical school studies,
and then I became, after I became a doctor,
I became board certified in Lifestyle Medicine
by a great organization called the British Society of Lifestyle Medicine.
So they're a relatively new branch of Lifestyle Medicine in the UK,
and they're following the likes of the American College of Lifestyle Medicine.
So we're really seeing every year,
lots of physicians, lots of registered nutritionists, lots of dietitians, pharmacists that are pursuing
this preventative lifestyle medicine space. And it's really starting to have a big uptick. And what happened
with the kind of videos was it was during the 2021 lockdown around January time. And I remember my
doctor colleagues, they said to me, because I used to be a personal trainer and nutrition advisor,
they said to me, because now you can't do any of those activities anymore because of these,
you know, sporadic lockdowns and gym's not being open and, you know, no one being able to
come to your house and things like that, why don't you give the advice you were giving to people
in person? Why don't you just put it online instead? And I said, yeah, maybe, you know, what,
you know, how would I do it? And they said, well, the new biggest thing now is TikTok, right? And I said,
oh, come on, surely that's not just full of, you know, 13 year old girls dancing in front of the camera, right?
And they said, no, like, the education space is actually really big.
So I was like, okay, fine.
So I downloaded the app.
And literally the algorithm is so smart, it's just crazy how social media does it.
But within kind of 10, 15 minutes of me scrolling, I entered the wellness space, right?
And what I saw was just horrendous.
I saw viral videos of, you know, ladies holding a cucumber, lemon blend of green.
And then she captioned it, how I lost 20 pounds.
two weeks or three weeks and I'll just like, what? And there was tens of thousands of comments being like,
oh, I'm starting this tomorrow. I'll think so much amazing. And I was scrolling like, people can't
be serious, right? That was kind of the light bulb moment for me where I knew I had to do something.
I was like, this is ridiculous. I can't just be scrolling on this app looking at all the stuff that
people are buying into all of the potentially harmful, you know, financially damaging, you know,
like fads and trends out there. So I dip my toes in the water and I just started off with funny
kind of gym fitness related videos. And then very quickly people started tagging me in, you know,
other people's videos asking me to either validate or invalidate it. So I was like,
oh, interesting. So then I started responding to other creators videos and that's when there was a
massive uptick. I was gaining 100,000 followers a month from responding to people. And the clear
desire or the need to have online information vetted was just apparent, and now I've never looked back.
So that brings us to your book then, saturated facts. So in the book, you look at some of these
common diet and nutrition myths. So the first question is, why do you think these myths are so
pervasive and so persuasive? Yeah, good question. I think a lot of it has to do with, first of all,
the complexity of health and nutrition science. It's very, very complex. You know,
The parallel or the comparison I like to make, typically when explaining this, is if you take
a pharmaceutical research study where you're comparing the effects of a new drug or, you know,
maybe you're comparing a new one to an old one, all you have to do is get two groups of people
who are very similar in terms of demographic health-related outcomes, and you give one group
the drug and you give one group a comparison or a placebo, right?
and then you monitor that over time.
That's a very simple study design,
and it's a very easy way for researchers to assess
whether that drug is having a benefit or not.
Now, in nutrition and lifestyle and diets,
it's a lot more complicated than that,
because if you're wanting to ascertain the effects
of a specific nutrient or food,
you need to realize people don't eat foods in isolation.
They don't eat nutrients by itself.
This is all part of the food matrix.
So when you've got someone that eats three times a day and you're following thousands of people
over time, how do you know if the vitamin B12 or the vitamin D or the calcium or the magnesium is having
the positive effect or is it the whole host of other factors involved in someone's diet and lifestyle
that could be at play? So that's number one. I think nutrition and health research is very,
very complicated and people get confused and when the lay person reads, to be honest, even lots of
professionals. When anyone reads headlines or, you know, the abstract of a research study,
it's very hard to understand what's going on. So naturally, there's going to be a lot of
contradictory conflicting information. Number two, nutrition and diet and lifestyle is very
emotive. It's very personal for people. People have a real affinity to want to reinforce or
reaffirm their previously held beliefs. So confirmation bias is a huge thing in health research.
you know, you can show creators a thousand different forms of evidence from different populations
and they'll still believe that, you know, seedals are toxic or, you know, natural is better
or an all meat diet is superior to a vegan diet or whatever, right?
And bear in mind that 60% of UK adults now, over 60% go to online or internet sources for their health
information. So that's a really alarming statistic because us as professionals, we need to meet
where the patient, where the consumer is looking. So no one's looking at, you know, GP handout booklets or
leaflets or no one's looking at poster presentations, no one's looking at medical journals anymore.
They're getting their health information from social media. So if people like myself don't meet
them where the person is looking, we can't hope to have an impact on this space.
So let's have a look at some of these sort of common trends that you talk about in the book
in a bit more detail then. So first one, I think.
anyone that's looked into this kind of thing will have heard of is the keto diet. It's been really
popular over recent years and it's kind of lauded as a sort of one-stop shop, not only for weight
loss, but overall better health. So what exactly is it and what do its proponents claim?
Yeah, good. So the ketogenic diet is a diet that's very high in fat, moderate protein and extremely
low in carbohydrates. There are some iterations that is even below.
you know, 10 to 20 grams of carbohydrates a day, which is literally nothing.
So, you know, it was actually originally invented or utilized as a dietary intervention
for pharmacoreistant epilepsy in kids. So bear in mind that actually this diet didn't come
about as a weight loss diet. It's only been implemented as such in recent history.
Its proponents often state things like, you know, you'll get superior weight loss benefits,
you'll see a massive drop in weight,
but people confuse that for being fat
when actually it's just water weights
because when you cut out all carbohydrates,
once you've depleted your glycogen stores
in your muscle and your liver,
for every gram of glycogen,
we hold about three to four grams of water.
So naturally, when you go on the keto diet,
in the first week, you're going to drop,
you know, for the average person in the UK,
you might drop, you know, 5, 7, 8, 9 pounds.
So that's a few kilograms of weight.
But bear in mind, it's not actually.
fat. Other people claim that not only is it superior for weight loss, it's a really good way to
reverse insulin resistance or type 2 diabetes, a very good way to reverse or improve fatty liver
disease, and even improve some aspects of mental health and cognitive decline. Now, a lot of these
benefits can be solely attributable to the actual, any kind of weight that you lose in the short term.
So bear in mind that just because you're able to improve some outcomes in terms of type 2 diabetes,
in terms of fatty liver disease, or even waist circumference or markers of metabolic syndrome,
that doesn't actually mean the ketogenic diet is the best diet.
It just means that you've managed to lose a bit of weight, and now some of these health outcomes are improving.
What's really interesting is when you compare diets that are balanced up to 60% of total calories from carbohydrates,
to ketogenic-style diets where you've almost got zero carbohydrates,
as long as the calories are matched and the total number of calories you're eating are the same,
there is actually minimal differences in type 2 diabetes improvement,
in overall weight loss outcomes, in overall, you know, fatty liver improvement outcomes.
Bear in mind that typically a ketogenic diet will have a lot more saturated fat intake.
And when you look at isochaloric, meaning same,
calories studies, people that are already a healthy weight and they're not doing the diet because
of a weight loss problem, you actually see worsening markers in liver enzymes and type 2 diabetes
markers when you look at people who are already at the same weight, so they're not actually
losing weight. So this is the kind of nuance that people often miss and they think that just because
they're having short-term success on the ketogenic diet is very, very difficult to sustain or adhere to
that style of eating for the rest of your life. What I like to say is, don't do a dietary
intervention as a short-term fix for anything, because your health is dependent on long-term habits,
sustainable habits that you can maintain for decades. So another commonly talked about method
to drop a few pounds and improve your health, so the claims go, is intermittent fasting.
So there's currently a lot of different approaches to this, but what's the basic idea?
Yeah, so the basic idea is there are lots of iterations
of intermittent fasting. You have typical ones include, you know, 168 fasting, which is you fast for
16 hours of the day and you have an eight-hour eating window. There are also 24, so 20 hours of fasting,
four hours of eating. Then you've got other fancy iterations such as the alternate day fasting
where you fast on for one day and eat for the next day. Basically, all of these styles of diet,
they kind of stem back to people advocating for,
we have to eat like our ancestors,
like our hunter-gatherer ancestors, right?
You know, food wasn't available at all times.
And yes, that is true, of course.
You know, we live in a society now
where within 10 minutes after this podcast,
I'm going to press a button on my phone
and I'm going to have a hot meal at my door in 10 minutes, right?
Obviously, we've never been able to do that
in the history of mankind.
So what they're saying is, don't be afraid to go long periods of time without eating to enable our gut to kind of, you know, rest and digest per se, you know, to avoid the overconsumption of food, you know, and lots of other reasons, you know, maybe aligns with our natural bodily systems.
What I will say is the majority of intermittent fasting protocols, they improve health outcomes simply because you are restricting.
the time in which you're eating, therefore you're restricting how many calories you're eating,
right? So that's where the majority of its benefits lie. Now, whether that's for, you know,
chronic metabolic disease, you know, PCOS, type to diabetes, fatty liver, obesity, and even aspects
of mental health improvements as well. Now, where it does get a bit more complicated is when you're
choosing to have your eating window. So let's say your waking hours are from eight to eight,
right? You wake up at 8 a.m. You go to sleep at 8 p.m. Okay, fine. If you're choosing to have your
eating window towards the later part of that day, so let's say from 1pm to 8 p.m. or 12 to 8 p.m.
Then you might not see any additional benefits. The benefits that you'll see will largely come from
just because you're restricting your eating window. Where there might be additional benefits
beyond just simply restricting your calories is when you consume your eating window in the earlier
part of the day. Now, I talk about this in my book. There's a whole chapter called
Prono Nutrition, where I talk about the science of meal timing. Now, stacking evidence
from the last 15, 20 years, with lots of control studies are showing that when you consume
your food in the earlier part of the day where you have the majority of your calories, that's
better for glucose regulation, so how well we can manage our blood glucose levels, for fatty acid
oxidation, so that's how, you know, efficiently we can break down fats. Just for generally,
energy and lethargy outcomes as well. And also the big one, appetite regulation. There was a really
well, tightly controlled study done in 2022 by Ruddak and colleagues where they gave participants
the exact same food, the exact same meals they were provided by the researchers. I think it was
40 to 45 percent of their calories at breakfast versus the group that had 40 to 45 percent
at dinner. The group that had the front loadings of the big breakfast, they had significant
improved appetite and satiety levels or hunger levels across the rest of the day.
So that implies that if you have a large breakfast as a routine, which better aligns
with our circadian rhythm, you'll be much more effective at controlling our total calories,
not giving into cravings late at night and not feeling the need to snack and overindulge.
So there are lots of additional benefits that come from shifting our calories earlier in the day.
Now, whether you choose to intermittent fast in that way, then you might see additional benefits.
But if you're doing the typical 12 to 8pm fast, then you might just get benefits from the fact that you're restricting your calories.
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So another dietary choice that's hugely gained popularity over the last few years
is veganism or its offshoot plant-based eating.
Obviously there are lots of reasons why people might want to adopt this style of eating,
for environmental reasons or considerations about animal welfare.
But do these types of diet actually provide any health benefits?
Yeah, good question.
So what I like to say about most dietary patterns is it can be done extremely well or extremely poorly.
You know, just because someone's vegan doesn't mean that they'll be having a healthy dietary pattern.
And, you know, the only exception to that I'd probably say is the carnivore-style diet.
there is no iteration of an animal-only diet that will be healthy in anyone's book, right?
So that's the only style of diet where you can't have a good and a bad style of eating.
But the vegan diet is a very kind of interesting one because a lot of people who adopt it,
they automatically assume that they'll just improve their health just by going vegan.
But you have to remember that we live in an obesogenic environment now where the majority of our eating
pattern comes from ultra-processed heavily refined foods with lots of added sugars, lots of added
oils, added fats, which add a necessary amount of calories. Food manufacturers are very smart now.
They know what combination of nutrients to include in a product to get you to really indulge
and find it very, very tasty, right? So if you look at any kind of mainstream desserts or
patissaries or donuts or cakes, they will have a combination of sugars, fats, and a bit of salt.
So when you provide that combination of ingredients, the body is like, whoa, this is a really tasty food.
I'm not just going to have one slice.
I'm going to have several.
And they're loaded with calories.
So that's where the issue arises is just because you're plant-based, we really still need to be focusing on minimally processed foods.
So foods that typically resemble, you know, the food that appeared in nature, right?
I'm not saying you have to literally go and pick your apples from the tree.
That is not what I'm saying.
What I'm saying is the closer the food resembles to its original form, typically the more satiating, the more filling, the less you'll be able to eat because food naturally comes or a lot of plant foods naturally come with fiber.
And the big problem with ultra-processed foods is you're stripping the fiber from that food and you're condensing it into a tight package like a bar or a packet or a chocolate or whatever.
And that becomes really, really easy to overeat.
So just bear in mind that plant-based eating can obviously be very, very healthy for you.
And this is something I elaborate on in the book.
But remember, you have to still be mindful about what you're choosing to eat day in, day out.
Because the rise of, you know, junk vegan food these days is huge.
You know, I love having junk vegan food.
Like I can't get halal meat everywhere I go.
So I love going to an exclusively vegan restaurant and having, you know, it's called like chicken in
burgers, right? It's like fake chicken burgers and stuff, right? So just bear
in mind that just because something's vegan doesn't make it healthy, you still have to be
mindful. But of course, you know, lots of people are, and rightly so, they are taking up a
plant-based diet because of the environmental concerns, the ethical concerns. And that's
perfectly fine. Don't make claims that something is healthy just because you're plant-based.
You have to still be mindful. So you mentioned earlier there, this idea of the carnivore diet.
So I've seen some influencers claiming that their diet consists almost solely of animal protein.
That's obviously not a good idea, you said.
Yeah, yeah.
I mean, this is probably the most dangerous dietary trend of the last couple of decades at least.
And the reason why it's dangerous is not because of the effects people will see in the short term.
It's because we know unequivocally that when you exceed saturated fat intake
beyond 10% of total energy.
So for most people, that would be, you know, more than 25, 30 grams a day, right?
That's actually not that much.
If you get a really fatty cut of meat, you can easily hit 15, 20 grams of saturated fat
there, like very, very easily, right?
The issue is that when you exceed 10% of total energy from such saturated fat,
all of the controlled research, which was done by actually my previous research methods
lecturer in the University of East Anglia called Lee Hooper, she has done multiple meta-analyses
of multiple controlled trials, which show that the rates of cardiovascular events and outcomes,
such as heart attacks, strokes, you know, cardiovascular disease, vessel disease, you know,
plaque formation, a lot of these outcomes. The actual rates of incidents are pretty low when you hit
7%, 8%, 9%. Then when you hit 10%, there's a massive rise.
across all of these outcomes.
So we know that there's a threshold, the body likes,
and we know that when you exceed that threshold over decades,
you'll likely cause yourself lots of problems.
The reason why the carnival diet is dangerous is because people are confusing,
short-term feeling good with long-term health outcomes, right?
So because the carnivore diet strips you of all plant-based foods,
for example, people that have very severe chronic gut issues like celiac disease, you know,
IBS, inflammatory bowel disease, you know, lots of intolerances to different fibers or fruits,
then when you go to a carnival diet, you're obviously going to feel like it's doing something
good because you're no longer consuming plant-based fibers. So when you don't consume those fibers,
you allow your gut to rest and, you know, you might not have any bloating or flatulence or diarrhea
or constipation. Fine, fair enough. But,
This is called an elimination diet.
This is not a diet that you're supposed to be doing over the long term, right?
These are supposed to be medically supervised, controlled diets,
where you're supposed to reintroduce these plant foods slowly over time,
where your gut can actually slowly adapt to it
and build the microbiome necessary to digest it properly.
So the problem is people are confusing, oh, my gut feels so much better now.
I'm not lightheaded. I don't have bloating. I don't have diarrhea. Therefore, my health must be
improving. No, because we don't see cardiovascular or cancer outcomes, not for several decades.
So there was a really interesting anecdote that I cited in my book actually because we know that
the carnival diet trend love anecdotes. So I decided to give them a taste of their own medicine,
right? There was a gentleman called Michael Riley who documented his entire story on Twitter. And he was a very
lean, you know, athletic, six-pack washboard abs kind of guy. And he was on the carnival diet for,
I think, over six years. And what they found, that even though he felt fantastic, you know,
he was living his life, when he got checked up medically, they found that his coronary arteries
were blocked by 95 percent, right? And this was the left anterior descending archery,
which we call in medicine the widow maker, right? And we call it the widow maker, because when that gets
blocked, it kills because it supplies the majority of the heart, right? So if he never got
life-saving surgery, you know, that time he got checked, there's a very, very strong chance.
He would have basically just immediately passed away from a massive, you know, MI or my
cardio or function or heart attack, as we call it in medicine. So we're now starting to see more and
more, you know, personal stories of harm being done by people that have been on the carnival diet
for many, many years. But unfortunately, we're not going to see the true damage for another decade.
So I really, really just advise, strongly encourage people to not make it a long-term way of life.
If you want to eliminate plant foods completely, then do it where it's medically supervised
for a short period of time, where the aim is to slowly reintroduce plant foods back into your diet.
So you kind of touch on this right at the start. But another prevalent trend is
so-called detox diets.
So what's everybody getting wrong about those?
Yeah, so, you know, just the day, actually,
I saw a video that I was tagged in.
I get tagged in probably 200 plus videos a day.
And the idea that we can enhance our detox pathways
to become a superhuman and live to the age of 120.
Like, you see this kind of narrative a lot,
and it's just very stupid because, you know,
a lot of our organs, our lungs, our skin, our liver,
our gut, our kidneys, you know, they all play an essential part in detoxification, right?
And this is why, for example, when someone goes out on a heavy Friday night, you know,
drinking alcohol, we don't just immediately pass away from chronic toxicity, right?
We don't pass away because our body is doing what it's designed to do,
which is filtering out actual harmful toxins.
And that's why our kidneys are so powerful and they filter so much, you know,
plasma and blood every single day. So the idea that you can do specific dietary or lifestyle things
to somehow turn on certain detox pathways is just absurd because detoxification is happening
every single minute of the day. Obviously, we can support our organs that do detoxification.
Of course, you know, like reducing our intake of saturated fat, increasing our intake of polyunsaturated fat
to enhance liver function.
We can increase our fiber intake
so we can reduce the amount of fats
that are getting blocks in our system.
If you have any kind of skin triggers,
you know, getting some sunlight
and vitamin D onto our skin every day
can obviously improve our state of, you know,
skin function and skin health.
Obviously, just generally living
a positive and healthful lifestyle
will of course improve our body's ability
to detoxify any kind of poison
or toxin, right? But to market the idea that there are certain specific protocols that you can
employ or buy or supplements you can take to, you know, turn on some kind of superpower detoxifier,
it's just really, really gimmicky and really kind of sad that a lot of people are buying into it.
And I feel for people's bank accounts. So kind of by way of summing up what we've just talked about
in the last half an hour or so, I mean, what key piece of advice would you give to anybody who's
listening to take away from this and actually implement in their daily lives.
Yeah, I would say the best thing you can do, especially if you're a social media user or
scroller, I would say is to develop what I like to call your BS radar, right?
So develop your ability to spot misinformation, disinformation, and the ways in which you can do that
include things like people that blame a single food or nutrient.
for the rise in chronic disease, it's just talking waffle because chronic disease doesn't happen
from one single thing. It happens due to a culmination of biological, psychological,
and social environmental factors, right? So any scientist knows that. And so any credible scientists
will not blame the rise and disease on a single thing. So if you hear that,
immediately scroll on, block and follow whatever. The second thing I'll say is watch out for
absolutist statements. So people making claims that are,
extremely confident and extremely all-encompassing. So, for example, they'll say things like,
these are the five worst foods for your health, right? Who are you talking to? You're talking to
lots of different people with different, you know, medical conditions, with different demographics
who might be intolerant or, for example, if you take myself and you take someone that's got a flare-up
of inflammatory bowel disease, an apple for me is obviously not going to be harmful. But an apple for them
can cause major gut issues, you know, pain rises in inflammation, you know, maybe constipation
or diarrhea, you know, excessive ill health. And that's because any two people are not the same.
So whilst we do have general dietary principles that everyone should employ, the specifics
of, you know, these are the five worst foods for you. They don't apply like that. So people that
lack balance and nuance in their arguments, you don't want to listen to
what they have to say. And there are other things that you can look out for, you know, buzzwords like
inflammatory without any real meaning, you know, they're not actually explaining what is actually
increasing in inflammation. They're just throwing out a buzzword, you know, detox, gut health.
Okay, gut health, not so much, but still people do use gut health in a very buzzword, kind of click-baity way.
There are these, you know, techniques that you can look for when scrolling your social media
feeds or looking to headlines in magazines and newspapers to really enlighten you as to what is
probably credible and what's not credible, right? So if you develop your radar like this,
you'll be far better protected from, you know, coming across or actually believing misinformation
or disinformation. So I go through a lot of these claims and fads in my social media pages
and also I debunk the majority of them in immense detail in my book, of course, as well.
to this episode of Instant Genius, brought to you from the team behind BBC Science Focus.
That was NHS Doctor and social media star Dr Ids. To read more about the topics we've just
discussed, check out his book, Saturated Fax, or follow him on TikTok or Instagram as at
Doctor underscore Ids. If you liked what you just heard, please consider subscribing to Instant Genius on your
preferred podcast platform. The current issue of BBC Science Focus magazine is out now. Pick up a copy
wherever you buy your favourite magazines or download a copy on your app store of choice. You can also
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