I think this author is not being very scientific. E.g. in part 2 he dismisses carbs as a cause of obesity, and he begins by citing a trial involving 16 people.

I think this author is not being very scientific. E.g. in part 2 he dismisses carbs as a cause of obesity, and he begins by citing a trial involving 16 people. "A study from 2003 examined low-fat diets in 16 overweight people. Naturally, this low-fat diet was high in carbohydrates. When patients started the low-fat diet and were told to eat as much as they wanted, they actually ate 291 calories less per day." I think it is important to note that obesity skyrockets from 1980 on. The exact year the USDA began mandating a high carb diet. https://images.squarespace-cdn.com/content/v1/5a4d5666bff20053c65b7ff2/1520620090133-5DLTOEX0RMQNJY2OR5FC/Rise+in+US+Overwight+Obsetity+Coincides+with+DGA.png?format=2500w https://images.squarespace-cdn.com/content/v1/5a4d5666bff200... I recommend listening to Garry Taub instead. He is a physicist. Nutrition scientists are literally not allowed to deviate from the official dietary fat causes obesity/lipid hypothesis. So it requires outsiders to get at the truth here. Why We Get Fat: https://youtu.be/qKuDamgGkZQ https://youtu.be/qKuDamgGkZQ Big Fat Fiasco: https://youtu.be/exi7O1li_wA https://youtu.be/exi7O1li_wA Big Fat Nutrition Policy: https://youtu.be/hzQAHITIUhg https://youtu.be/hzQAHITIUhg Edit: Carbs are sugar strung together. They are quickly chopped up and metabolized, raising your blood sugar level. To maintain homeostasis the liver responds with a squirt of Insulin. Insulin signals to your fat cells to start storing the excess sugar, which would otherwise poison you by hyperglycemia. In a normal high fat/ low carb diet, you feel full after eating, and your blood sugar returns to normal. At this point your fat cells can release those sugars back to the blood stream (to prevent hypOglycemia). But with a low fat diet your body doesn't get enough vitamins and minerals (most of which are fat soluble and removed, or made indigestiable without fat) so you stay hungry. You are forced to eat more of this high sugar food, which keeps your blood sugar high and prevents your fat cells from completing the second part of the fat/glucose cycle. So your fat cells swell and divide, making you bigger, and the bigger you are, the more nutrients your body demands. The obesity epidemic began in 1980 when the USDA began dictating a high carb diet. There are dozens of trials involving 10s of thousands of people going back 70 years that show a clear trend of carbs causing obesity in the West. I say West because it also clear that there is a genetic component involved in the carbs/fat cycle or insuline response. Which may explain why one isolated community can consume a lot of carbs from root veg and stay lean.