These days, an article titled “BBC human experiment: twin doctors one eating sugar, one eating fat, who ended up getting fat? the article in the WeChat circle hot circulation. Sugar and fat war The experiment was simple but interesting, one person ate only sugar, mainly bread, doughnuts, pasta, potatoes, rice, vegetables and fruits, and even cola and white sugar. The sugar content is super high and contains only a very small amount of fats. The other person eats only fat, mainly cheese, meat, steak, chicken with skin, ham and egg yolk. Super high fat. Fruits are strictly forbidden and there are only very few vegetables. After a month, see which of the two will actually gain weight. Find out “Who is worse, sugar or fat?” The end result: both of them lost weight! Chris, who ate sugar, lost 1 kg, of which 0.5 kg is fat and 0.5 kg is muscle. After a month of uncontrolled binge eating of junk food, the weight loss was actually 1 kg! Zander, who ate fat, lost 3.5 kg, of which 1.5 kg was fat and 2 kg was muscle. More weight loss! Cholesterol-wise, Zander was exactly the same as he was a month ago, and Chris was almost unchanged. Eating fat, did not raise cholesterol. In terms of blood sugar, Chris, who ate sugar all day long, had normal blood sugar. Zander, who ate fat, however, blood sugar rose from 5.1mmol/L to 5.9mmol/L. The most amazing thing about the whole process is that simply eating sugar, or simply eating fat, even if you want to eat as much as you want to eat, sugar and fat in the body did not overload did not trigger obesity. Will people pay more attention to the fact that eating sugar and fat will not make you fat and will not cause an increase in cholesterol, and that eating large amounts of sugar will not cause diabetes? This really overturned our previous knowledge. Is sugar or fat better? In fact, almost all of the content of this article is taken from a BBC (British Broadcasting Corporation) documentary in January 2014 – called “Sugarvs.Fat” (translated: sugar fat war). The article is more exaggerated, such as “people who eat sugar are smarter”, “those who eat sugar are stronger than those who eat fat”, etc. The BBC documentary does not draw such a simple and brutal conclusion. Now is the era of evidence-based, we have a lot of evidence from multicenter, large sample, randomized, controlled, blinded studies. So it’s easy to see how this trial would have been subject to so many confounding factors that it would have been impossible to draw valid conclusions. With only 4 weeks and 2 subjects, there is no way to answer the question “is sugar better or is fat better”. The idea of “confirming” preconceptions is a “TV show”. The Dietary Guidelines for Americans retain clear limits for fatty acids and fats. In the newly released Dietary Guidelines for Chinese Residents 2016, sugar control is also proposed for the first time: daily sugar intake should not exceed 50g, preferably under 25g. Therefore excessive intake of both fat and sugar is harmful to human health.