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Calories, fat or carbohydrates? Why diets work (when they do)
- skunkworks 16y agoGary Taubes is so incredibly wrong that it makes me sad. If you want to read some intelligent analysis of dieting/nutrition, I suggest reading Lyle McDonald (http://www.bodyrecomposition.com http://www.bodyrecomposition.com) and Alan Aragon (http://www.alanaragonblog.com http://www.alanaragonblog.com).
- kareemm 16y agowhy is he wrong?
- ryanwaggoner 16y agoWhy are your preferred sources better than someone else's? Not saying that they can't be but you've provided nothing more than hyperbolic hand waving to explain why two other random guys on the Internet are more reliable.
- noarchy 16y agoTaubes may be wrong, but he has a very devoted following that apparently includes HN. It's popular to sell magic bullet ideas, like carb-cutting, and the anti-carb brigades have made an entire industry around this. It is far less popular to tell people that they need to get off their rears, and get active, since they'd rather stay on their rears and find a magic bullet that will let them remain sedentary, and still lose weight.
- aantix 16y agoThe body is constantly fighting you to maintain current weight. That's why you get really hungry after a hard workout or want to go to sleep after severely cutting your caloric intake. Your body will respond. You're giving exercise way too much credit. http://www.time.com/time/health/article/0,8599,1914857,00.html http://www.time.com/time/health/article/0,8599,1914857,00.ht...
- noarchy 16y agoYou're giving sedentary lifestyles way too much credit. If you want teenagers with the fitness levels of elderly smokers, you've already got it happening out there. Quit driving to work, and start biking to work, and you'll see results. It really has to be about lifestyle, and spending too much time on one's behind, combined with eating badly, is slowly killing millions.
- rfugger 16y agoCached copy: http://www.garytaubes.com.nyud.net/2010/12/calories-fat-or-carbohydrates/ http://www.garytaubes.com.nyud.net/2010/12/calories-fat-or-c...
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- latch 16y agoEat better and exercise more.
- noarchy 16y agoThis. I don't understand how people can ignore how sedentary society has become when discussing the obesity problem. You can easily get away with eating a lot of carbs; being physically active not only allows it, but often requires it.
- wycats 16y agoTaubes actually addresses this point very carefully in both Good Calories, Bad Calories and Why We Get Fat. He cites quite a few cases of communities with high rates of obesity, and varying rates of nourishment and sedentary behavior. One very interesting result is that some of the communities lived in incredible poverty and with significant physical exertion. I'd recommend that you read the book (Why We Get Fat: And What to Do About It) and see whether he addresses your concern. Far from ignoring our sedentary society, Taubes makes a strong case for other factors.
- josephgrossberg 16y agoYes, but what is "better"? And what is the best way to make both life changes enduring? (E.g. if someone is constantly hungry, their change in diet is probably not sustainable.)
- latch 16y agoI'm a layman, but I'm highly skeptical at the amount and complexity of information in this field with respect to your average person (which is not the same as scientific and medical research into the subject of nutrition, chemistry, etc.) What's better? 5 servings of fruits and vegetable. Unrefined, whole foods. Water. Legumes and grains. Fish. Combine such a "diet" with 1 hour of light exercise (for example walking) a day and I bet most people would be considerably healthier (all the better if they can do aerobic exercise a couple times a week, say on the weekend). Most impressive this is also normally a cheaper way to eat and doesn't have to taste bad.
- dkarl 16y agoThere's a difference between how people interested in public health read this research and how people such as us who are interested in our own individual health read it. People interested in public health wonder, "What happens when you tell people to follow diet X?" That's what studies like this test. People like us wonder, "What happens when an individual actually follows diet X?" Questions like this are never studied at all, because it's difficult and expensive. Almost everybody lies about their level of compliance, and when people aren't actually lying, they're still underreporting because most people remember eating less than they actually do. Those facts about underreporting are not controversial. I don't know where the misrepresentation happens, whether in the science itself or in the science journalism, but the studies most people read about in the newspaper or on the web are not about diet from an individual point of view. They don't study what happens when somebody actually follows a certain diet. That would require keeping people in an institutional setting and controlling or monitoring their food intake around the clock. That's really expensive, and if you're interested in improving public health, it isn't useful to know what the results of following a particular diet are, because you don't have control over what people eat. You only have influence over the public health message: what people are told they should eat. So that's what is studied. The scientific debate over diet is not about what you should eat to improve your health, but what we should tell the public to eat to improve their health. If 50% of people on a low-fat diet stay up all night eating low-fat cookies and big bowls of pasta with low-fat margarine, then from a public health perspective, low-fat diets make you fat.
- wycats 16y agoIt's certainly true that dietary studies suffer from problems of underreporting. So it is possible that the the results of most recent studies (summarized well in http://en.wikipedia.org/wiki/Medical_research_related_to_low-carbohydrate_diets http://en.wikipedia.org/wiki/Medical_research_related_to_low...) all suffer from a reporting bias that leads people consuming low-fat diets to more significantly underreport their consumption than those on low-carb diets. However, that in itself would be a significant finding. If the level of reporting compliance varies widely between different diets, it may also mean that compliance with the diet itself varies. I'd personally be interested in evidence on this point. Also interestingly, studies using animal models of obesity tend to back up the findings using the (admittedly flawed) studies using human reporting. Taubes' most recent book goes into some detail about findings using rat obesity models (such as experiments involving ovary removal and experiments involving Zucker rats, which are genetically prone to obesity). One very interesting result from those studies is that rats prone to obesity (for whatever reason) will often die of starvation while retaining some subcutaneous fat. Obese-prone rats also very clearly exhibit sedentary behavior when the food supply is low, and more active behavior when the food supply is high. They also have more fat when given identical amounts of food as lean-prone rats. In short, while we cannot be certain about the recent experimental results, because of reporting bias, it's hard to believe that the experiments all have no validity, and that animal models of obesity are flawed. Additionally, if there was significant reporting bias, it would likely be the result of compliance problems, which would be extremely relevant to the discussion at hand. It's one thing believe that the jury is still out on some of this; it's quite another to stick to preexisting beliefs on the grounds that virtually all recent studies have some flaw or other.
- powera 16y agoAnother diet article that's very, very long, low on facts, and repetitive on the few facts they have. Are these showing up just because people have New Year's Resolutions?
- jerf 16y agoAnother diet blog post. If you want facts, buy the Good Calories, Bad Calories book, or presumably his recent book which I can't recommend either way as I have not read it. If Gary Taubes does not have enough facts, regardless of how you like his interpretation of them, you may give up all hope of ever understanding diet issues yourself now. So as to avoid a redundant post, I make this point to KirinDave as well. This is not Taubes' argument, it's one particular small point, a marketing teaser. If you really want to dismiss him you're going to have to do a lot better that poking apart one blog post, you've got a book (or two, though I don't know what the overlap is) to dismantle.
- yummyfajitas 16y agoWhy bother reading the book when the blog is either flawed (as this post is) or dishonest (as the one from yesterday is)? If the blog is junk science, it's unlikely that the book is better.
- jerf 16y agoNeither are junk science. People's junk science detectors and the competition to be the first to declare that something is "fatally flawed" are going off excessively quickly. (See also the rush to be the first that some show or something has 'jumped the shark'.) If there's junk science afoot it's unfortunately in the "mainstream".
- wycats 16y agoI've read both Good Calories, Bad Calories and Why We Get Fat. There is significant overlap, and it is most notable in the less technical areas, where he lays out the arguments against the conventional wisdom. That said (and I say this as a very technical reader), there were aspects of Good Calories, Bad Calories that went over my head because of their presentation and placement in the (very long) book. Why We Get Fat's treatment of LPL (http://en.wikipedia.org/wiki/Lipoprotein_lipase http://en.wikipedia.org/wiki/Lipoprotein_lipase) and HSL (http://en.wikipedia.org/wiki/Hormone-sensitive_lipase http://en.wikipedia.org/wiki/Hormone-sensitive_lipase), in particular, were described more clearly in the latest book, and the concepts related to them really make a difference in understanding the larger point. Probably the most important thing that I got out of Why We Get Fat is a better technical understanding for one of his core arguments (that the arrow of causation in calories in, calories out may be the reverse of what we expect). Specifically, he clearly describes the mechanism by which fat cells may pull in energy from the bloodstream, resulting in additional hunger and lethargy (ad infinitum). His new treatment of this subject, which starts with animal models of obesity, is extremely helpful and worth the price of the new book, in my opinion.
- johnwatson11218 16y agoI am about finished with "Why We Get Fat" by Gary Taubes. The main idea of the book is that carbs are what makes us fat and causes heart disease - not meat and fat as the medical establishment tells us. I know this same message is all over the place right now, one thing that makes the book unique is that he goes into the history of how the medical establishment came to the current viewpoint. According to Gary Taubes the European medical establishment was figuring out the carb/obesity link back in the 30s. WWII disrupted all that and when the Americans picked the question back up in the late 50s it was fat that was made the villain. He goes into a lot of the biochemistry as well. As I was reading the book I kept coming back to this notion that carbs are pushed down our throats and the main reason why is that they are cheap. Not only cheap but they are easy to transport and store. It made me wonder if the common people of ancient Rome developed some of the health problems that modern people face. After all, they were kept on a state sponsored diet of grain and bread.
- Create 16y agoSugar: The Bitter Truth http://www.uctv.tv/search-details.aspx?showID=16717 http://www.uctv.tv/search-details.aspx?showID=16717
- KirinDave 16y agoSo the crux of the argument is: 1. In this one particular study, caloric restriction diets were explicitly calorically restricted. 2. In this one particular study, low-carbohydrate diets were not explicitly calorically restricted. 3. Weight loss was similar for both groups, but we assume that the Atkins fatties were gorging themselves on meat while the other people were not. But, the data from this study was self-reported. To me, this is an immediate red-flag. It's two large waving red-flags for the inference the author is trying to engage in. He's basing a huge article on an assumption which is absent from data. This is anomaly hunting, plain and simple. The author obviously has a preconceived desire to support carb-limiting as the Deep Secret of weight loss, and so any anomaly is cast into evidence for this desire. This is not to say the author is wrong, I'm simply saying his logic doesn't hold and analysis falls apart as a result. It's at least as basic a concept to science as the notion of control that the article leads with: "You cannot draw strong conclusions in an absence of data." P.S., I'm not inclined to believe this good-calories-bad-calories stuff. I lost 100lbs over the course of 13 months, and I didn't do it by carb cutting.
- ryanwaggoner 16y agoData from almost all diet studies is self-reported (see comment by dkarl) and inherently unreliable, but it's the best we have. And his argument in this article isn't that carb cutting is the source of the weight loss, just that because we don't isolate the variables, we can't know for sure what the source is. How did you lose that much weight over 13 months?
- KirinDave 16y ago> his argument ... we can't know for sure what the source is This author's tone and content, in addition to other articles posted, leads me to believe he has a preconceived notion. The text is litered with example of this, like: “And if they’re trying to cut calories, they’ll be removing some number of total carbohydrates as well. And if these people lose fat on these diets, this is a very likely reason why.” > How did you lose that much weight over 13 months? Aggressively cut my calories and started going to the gym 5-7 nights a week. My exercise regimen focuses heavily on cardio, but I've gradually been increasing my resistance training. The bulk of the weight was lost in 6 months, about 40 lbs between Feb and July. The rest was a gradually lost before and after.
- wycats 16y agoWhat I find most frustrating about online comments on Taubes work is the amount of people who assume that this is just another crank peddling nonsense. Instead, Taubes has spent the better part of a decade reviewing the state of research and putting forth a compelling, detailed argument in favor of his position, that the high-carbohydrate diets associated with civilization are also the cause of the cluster of diseases known as diseases of civilization. His latest book lays out the argument in a more reader-friendly way than his earlier tome (Good Calories, Bad Calories), but it's hardly junk science, and Taubes is hardly a junk scientist. He has been a very good science journalist for decades, and has won the the Science in Society Award of the National Association of Science Writers three times. He does his homework. Again, I recommend that those whose gut reaction is to be skeptical of Taubes' thesis read at least his latest book, which addresses, very carefully, virtually all of the common reactions people have in these kinds of online fora. There are certainly areas still open to debate, as Taubes himself says repeatedly in his writing, but they are not about the knee-jerk topics most people think they will be about. If you're curious, feel free to take a look at the wikipedia post summarizing the results of low-carb diet trials at http://en.wikipedia.org/wiki/Medical_research_related_to_low-carbohydrate_diets http://en.wikipedia.org/wiki/Medical_research_related_to_low.... You'll find, at the very least, some cognitive dissonance. And that's really what Taubes' writings (in book and blog form) are about.
- dkarl 16y agoWhat I find most frustrating about online comments on Taubes work is the amount of people who assume that this is just another crank peddling nonsense. I don't think he can complain about that. He takes his case straight to the public, and he uses rhetoric that is likely to be effectively with the public. That's what cranks peddling nonsense do, so by convergent evolution he sounds exactly like them, which makes it much less likely that people will take his ideas seriously enough to find out if he really is a crank.
- philwelch 16y agoWell, thoughtful people at least. There's enough people who take actual cranks at face value that it's not, overall, a social maladaptation to do those things.