Comment by Aurornis
2 days ago
You’re exactly right: This one incident did not shape the entire body of scientific research.
There is a common trick used in contrarian argumentation where a single flaw is used to “debunk” an entire side of the debate. The next step, often implied rather than explicit, is to push the reader into assuming that the opposite position must therefore be the correct one. They don’t want you to apply the same level of rigor and introspection to the opposite side, though.
In the sugar versus saturated fat debate, this incident is used as the lure to get people to blame sugar as the root cause. There is a push to make saturated fat viewed as not only neutral, but healthy and good for you. Yet if you apply the same standards of rigor and inspection of the evidence, excess sugar and excess saturated fat are both not good for you.
There is another fallacy in play where people pushing these debates want you to think that there is only one single cause of CVD or health issues: Either sugar, carbs, fat, or something else. The game they play is to point the finger at one thing and imply that it gets the other thing off the hook. Don’t fall for this game.
I think common sense here can be a guide though. You don't need sugar at all, excluding high levels of anaerobic exercise. Your liver can produce the glucose your body actually needs from other sources (gluconeogenesis) and a lot of your tissues that use glucose also can use fatty acids or ketones. Fructose isn't needed at all. ("low blood sugar" isn't a symptom of not consuming enough sugar, it's a symptom of a disregulated metabolism -- ie insulin resistance or other conditions)
Saturated fats have all sorts of uses biologically.
I would caution that just because your body can make something doesn't mean it will have optimal performance when doing so. People in ketosis do have worse peak performance in sports than those that eat more carbs/sugar.
True, but also what performance are we optimizing? Do I want to be able to run faster, hit harder, lift more, etc..?
Or do I want to live longer?
They aren't necessarily mutually exclusive, but different actions could result in different outcomes for each.
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> worse peak performance in sports
For nearly everyone, this isn't impactful to their life. Only their vanity
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That has nothing to do with whether excesses of those nutrients cause cardiovascular disease, though. The general consensus is that the healthiest diet is one with 5-10% of total calories from saturated fat. For most people, it's necessary to restrict saturated fat to land in that range. We also need to distinguish between sugar and carbohydrates. Again, the general consensus is that intake of sugar and refined carbohydrates should be minimized, while 50-75% of total calories should come from sources of complex carbohydrates like vegetables, beans, and whole grains.
Carbohydrates are sugars (from the first sentence on wikipedia): "A carbohydrate (/ˌkɑːrboʊˈhaɪdreɪt/) is a sugar (saccharide) or a sugar derivative." Saying you need "50-75% of your energy from [sugar]" illustrates why that is a somewhat odd statement. Yes, glucose is much better than fructose, but eating a ton of glucose will still lead to high insulin spikes and inflammatory diseases. Complex carbohydrates are better in that they take longer to digest, not because they're magically different. Vegetables are good for nutrients not because you need their carbs.
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Funny you should say that after today's FDA announcement. (Not taking any side here just interested in how we determine what is a consensus these days)
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Looks like it's true that low-carb adapted athletes rely more on fat oxidation during exercise but performance suffers nonetheless because of increased oxygen demands that basically cannot be met.
Your entire argument here applies in the other direction as well. You do not need dietary saturated fats, and sugar has all sorts of uses biologically.
That is only partly true: you don't need dietary saturated fats, but you do need essential fats (omega-3 and omega-6), which are polyunsaturated. However, sugar does not have all sorts of uses biologically; it has only one: as one (but not the only one) source of energy.
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> There is another fallacy in play where people pushing these debates want you to think that there is only one single cause of CVD or health issues: Either sugar, carbs, fat, or something else. The game they play is to point the finger at one thing and imply that it gets the other thing off the hook. Don’t fall for this game.
Okay but right now we're talking about science getting corrupted by money. Which did happen in this instance, so that companies could hide the damage that sugar does to people.
Sugar does damage and scientists were paid to downplay that fact. It is not the first time. This is concerning when we talk about principles and public trust.
You're right that extrapolating from one flaw to claim wholesale debunking is a common logical fallacy: https://www.logicallyfallacious.com/logicalfallacies/Logic-C....
Where I'd suggest you go too far is implying that saturated fat and sugar are similarly bad. Technically you do hedge the claim with "excess", which is effectively a tautology, so the claim isn't outright false. You also don't qualify whether you mean excess in absolute terms (i.e. caloric intake) or as a proportion of macronutrients.
In practical terms, I don't consider it useful guidance based on the available evidence. As far as I can tell, there's little to no evidence that saturated fat is unhealthy (but lots of bad studies that don't prove what they claim to prove). Meanwhile, the population-wide trial of reducing saturated fat consumption over the past half-century has empirically been an abject failure. Far from improving health outcomes, the McGovern committee may well have triggered the obesity epidemic.
I think the benefits of "low fat" may have been dulled by how literally people took that message, and what companies replaced the fat with.
Most available "low fat" products compensated by adding sugar. Lots of sugar. That way it still tastes nice, but its healthy right?
Just like fruit juice with "no added sugar" (concentration via evaporation doesn't count) is a healthy alternative to soda right?
In truth your body is perfectly happy converting sugar to weight, with the bonus that it messes up the insulin cycle.
At a fundamental level consuming more calories than you burn makes you gain weight. Reducing refined sugar is the simplest way to reduce calories (and solves other health issues.) Reducing carbohydrates is next (since carbs are just sugar, but take a bit longer to digest). The more unprocessed the carb the better.
Reducing fat (for some, by a lot) is next (although reduce not eliminate. )
Both sides want to blame the other. But the current pendulum is very much on the "too much sugar/ carbs" side of things.
Agreed, this is a big part of the problem. The average person doesn't have anything resembling a coherent mental model of nutrition, and vague conflicting nutritional advice only adds to the confusion. The average person doesn't even know what a carb is, much less understand the biochemistry of how their body processes one.
Does "reduce fat consumption" mean a proportional reduction (i.e. increase carb/protein consumption) or an absolute reduction (i.e. decrease overall caloric intake)? In either case, what macros and level of caloric intake relative to TDEE are the assumed starting point? Who knows, but the net effect has been multiple generations hooked on absurd concentrations of sugar and UPFs.
> The next step, often implied rather than explicit, is to push the reader
This is the key part of this. It isn't even about the post or person that is being replied to, it's about the far wider audience who doesn't post but who who reads these interactions.
This clip summarizes the process: https://www.youtube.com/watch?v=xuaHRN7UhRo
First time ever I get : "The uploader has not made this video available in your country"
The big problem is that "truth tellers" very often leverage media platforms to sell their unscientific and unsupported or lightly supported opinions.
It's relatively simple to ultimately buy airtime to sell a product and have the one air host fawn over it as if what's been sold is the greatest truth of our lifetime. Some of the court documents against infowars placed the price for that sort of airtime at something like $20,000.
The problem comes in that the actual experts have very little want or desire to do the same. We're lucky if we see a few "science communicators" that step up to the plate, but they very rarely end up with the funds to sell the truth.
This a big part of how the "vaccines cause autism" garbage spread. Long before it caught on like it did, Wakefield was going around to conferences and selling his books and doing public speaking events on the dangers.
That pattern is pretty apparent if you look at major fad diets over the years. Selling that "you just have to eat meat" or "You just have to eat raw" or "You just have to eat liver" can make you some big money and may even land you on opera where you can further sell your magic green coffee beans.
Medical reality is generally a lot more boring. Like you point out, CVD is likely influenced by multiple factors. Diet, alcohol intake, exercise (or lack thereof) all contributing factors.
I disagree. Demand is the big problem, not supply.
The general public possesses domain-independent expertise on social pressures, institutional and financial incentives, and other non-epistemological factors that in some cases can support a rational rejection of scientific consensus.
Inadequate gatekeeping—premature or belated consensus or revision—is a failure of a given field of inquiry, not a failure of the general public.
More here: https://doi.org/10.1007/s11229-025-05423-7
> The next step, often implied rather than explicit, is to push the reader into assuming that the opposite position must therefore be the correct one.
See this in the constant "the MSM is imperfect, that's why I trust Joe Rogan or some random `citizen-journalist' on Twitter" nonsense. It's how everything has gotten very stupid very quickly. People note that medical science has changed course on something, therefore they should listen to some wellness influencer / grifter.
> excess sugar and excess saturated fat are both not good for you
The submitter of this entry is clearly a keto guy, and it's a bit weird because who is claiming sugar is good or even neutral for you? Like, we all know sugar is bad. It has rightly been a reasonably vilified food for decades. Positively no one is saying to replace saturated fats with sugar. In the 1980s there was a foolish period where the world went low fat, largely simply because fat is more calorically dense and people were getting fat, ergo less fat = less calories. Which of course is foolish logic and people just ate two boxes of snackwells or whatever instead, but sugar was still not considered ideal.
Someone elsewhere mentioned MAHA, and that's an interesting note because in vilifying HFCS, MAHA is strangely healthwashing sucrose among the "get my info from wellness influencers" crowd. Suddenly that softdrink is "healthy" because of the "all natural sugar".
The 80’s anti fat diet was mostly clogged arteries before we had all these anti cholesterol drugs and research showing how little impact dietary cholesterol has.
US obesity simply wasn’t as common (15% in 1985 vs 40% today) and at the time most research is on even healthier populations because it takes place even earlier. Further many people that recently became obese didn’t have enough time for the health impact to hit and the increase of 2% between 1965 and 1985 just didn’t seem that important. Thus calories alone were less vilified.
Put another way when 15% of the population is obese a large fraction of them recently became obese (last 10 years), where at 40% the obese population tends to be both heavier and have been obese for much longer. Heath impacts of obesity depend both on levels of obesity and how long people were obese.
The government and medical groups were advocating lower fat diets for CVD reasons, but among the mainstream it took hold overwhelmingly because it was seen as a mechanism for weight reduction or management. A gram of fat has twice the calories of a gram of protein or carbs, and this was widely repeated (yes, I was alive then). Similarly, if being fat was bad (and yes, it was viewed as very bad), then fat as a component of food must similarly be bad.
Obesity was obviously far less common, but concern about weight -- and note that weight standards were much, much tighter (see the women in virtually any 1980s movie, which today would be consider anorexic) -- was endemic culturally. Snackwells weren't being sold to middle age men, they were being sold overwhelmingly to younger office women paranoid about their weight, and it wasn't because they were concerned about their arteries. Low fat products overwhelmingly targeted weight loss, including such ad campaigns as the "special k pinch".
"Thus calories alone were less vilified."
I'm sorry, but this is simply ahistorical. Calories were *EVERYTHING* among a large portion of the population. What is your knowledge on the 1980s from, because it certainly isn't based upon observable reality.
In the 1980s, being slightly overweight made you the joke (like literally the joke, as seen from Chunk in the Goonies, and many parallels in other programs). As calories became cheaper and people's waists started bulging, it was an easy paranoia to exploit.
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> Positively no one is saying to replace saturated fats with sugar.
That has been kind of a consequence of that though. Low-fat foods tend to taste pretty bland, so sugar is added instead to improve flavor.
The US FDA requires that schools not serve whole milk or any products containing normal and natural saturated fats, and instead serve “low fat” versions which literally remove the fats and replace them with sugar.
You say nobody is doing this, but all the subsidized meals for my kids do this.
Skim/lowfat milk just... takes the cream out.
The same rule changes tightened the rules on added sugar.
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>which literally remove the fats and replace them with sugar.
This is not accurate.
No they didn't "replace" the fats with sugar. There is a chocolate milk option, just as there was before, but all options need to be 1% or low M.F., which nutrition and medical science overwhelmingly supports.
Is chocolate milk not ideal? Of course. We all know that. They shouldn't serve it either.
They will however recommend sugar, just by calling it something else.
See "carbohydrates", "complex carbohydrates", "integral grain" and so on.
Quite frankly, plain sugar from fruit is less dangerous than the complex carbs from grains. But fructose is still dangerous, just less so.
Starch is the preferred carbohydrate, since digestion depolymerizes it to pure glucose which can be used directly by cells.
Cane sugar, a disaccharide, is split by digestion into its constituent glucose and fructose molecules, and the latter must be further processed by the liver. It is 50% fructose.
High fructose corn syrup is 55% fructose.
A variety of other sugars, such as maltose and lactose occur naturally in a variety of foods. However, they are in low enough concentrations to not be a health problem.
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But there is also the fallacy where some people want you to believe basically everything will cause CVD and there is no single thing you could do to change it, so therefore just keep doing whatever you’re doing.
I call this the "Everything in Moderation" fallacy. From what I've heard people who say it, they emphasize the everything part of it. In other words almost everything is bad for you so just eat a little bit of everything and you won't get too much of the bad stuff. It's maddening.
The way I understand it (and my understanding is certainly poor, so I welcome well-supported pushback on it), is that few, if any, components in the food that we in developed countries eat today are actively harmful in themselves (with the caveat outlined below)
The main issue is overconsumption leading to overweight and obesity. Food that’s high in refined sugars and/or saturated fats tend to contribute to this, because it’s palatable and calorie-dense
So in that sense, yes - I believe that as long as your diet is varied enough that you get sufficient intake of all, or at least most, of the essential nutrients, and you don’t eat too much (i.e. in moderation), the ratio of macronutrients doesn’t make a big difference to your health outcome
The crux is that moderation is hard when the food is jam-packed with calories, and it’s so delicious you just want to keep stuffing your face
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I don’t think “Everything in Moderation” means you won’t get too much of the bad stuff. The philosophy alludes to the fact that in the modern world, trying to have the ideal diet is exhausting and near impossible. Lack of choice, money, time, education, self control etc. all contribute to you intentionally or unintentionally eating stuff that’s going to do irreparable harm to you. You could be eating salads and somehow poisoning yourself with pesticides and high sugar/fat/sodium salad dressings. Which is why this philosophy focuses on, do everything in moderation and you’ll maybe avoid CVD and other diseases for longer. It is meant for people who cannot meet the idealistic standards of what you are supposed to do.
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What is moderation? The volume (or mass) of a single apple of alcohol is going to make you very drunk (most alcohol is mixed with water: an apple's worth of beer is very little, that much Everclear is a problem).
That is what I hate about the everything in moderation. We need to do better since some things should be in much larger amounts than others.
I think we all would agree that any amount of rat poison is a bad thing, thought perhaps this is too much of a strawman.
Even if you can’t change the inevitability of CVD, what you do will absolutely change WHEN you get it.
I've never seen this fallacy.
What I've seen is that the best and most well documented way to prevent CVD is the DASH diet paired with exercise and potentially statins.
If you are an unhealthy weight you are both eating too much and/or not exercising enough. High calorie foods can be fatty, sugary, or both.
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Such "science" should be illegal.
If propaganda was illegal, who would decide what was propaganda and what was simply argumentation made from positions of relative ignorance?
The courts could easily decide whether a message has been paid for or not.
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the greatest travesty of modern science is that fraud is not illegal.
in every other industry that i can imagine, purposely committing fraud has been made illegal. this is not the case in modern science, and in my opinion the primary driver of things like the replication crisis and the root of all the other problems plaguing academia at the moment.
It's not legal, but intentional misconduct can be tough to prove.
https://www.justice.gov/archives/opa/pr/professor-charged-op...
https://en.wikipedia.org/wiki/Eric_Poehlman
https://en.wikipedia.org/wiki/Scott_Reuben
> in every other industry that i can imagine
Our own industry (tech) is rife with unpunished fraud.
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What, specifically?
Industry funded research? Results that disagree with the current consensus? Nutrition science entirely?