Does anyone have an opinion on this man and his theories? He wrote a very highly rated book on amazon that Bryan Callen mentioned on Rogan's last podcast called "Why We Get Fat : And What to Do About It." Here is a link to one of his lectures that summarizes his ideas: Here's a summary of his thesis: 1. Dietary fat, whether saturated or not, is not a cause of heart disease, or any other disease of civilization. 2. The problem is the carbohydrates in the diet, their effect on insulin secretion, and thus the hormonal regulation of homeostasis - the entire harmonic ensemble of the human body. The more easily digestible and refined the carbohydrates, the greater the effect on our health, weight, and well-being. 3. Sugars - sucrose and high-fructose corn syrup specifically - are particularly harmful, probably because of the combination of fructose and glucose simultaneously elevates insulin levels while overloading the liver with carbohydrates. 4. Through their direct effect on insulin and blood sugar, refined carbohydrates, starches and sugars are the dietary cause of coronary heart disease and diabetes. They are most likely the dietary causes of cancer, Alzheimer's disease, and other chronic diseases of civilization. 5. Obesity is a disorder of excess fat accumulation, not overeating, and not sedentary behavior. 6. Consuming excess calories does not CAUSE us to grow fatter, any more than it causes a child to grow taller. Expending more energy than we consume does not lead to long-term weight loss; it leads to hunger. 7. Fattening and obesity are caused by an imbalance - a disequilibrium - in the hormonal regulation of adipose tissue and fat metabolism. Fat synthesis and storage exceed the mobilization of fat from the adipose tissue and its subsequent oxidation. We become leaner when the hormonal regulation of the fat tissue reverses this imbalance. 8. Insulin is the primary regulator of fat storage. When insulin levels are elevated - either chronically or after a meal - we accumulate fat in our fat tissue. When insulin levels fall, we release fat from our fat tissue and use it for fuel. 9. By stimulating insulin secretion, carbohydrates make us fat and ultimately cause obesity. The fewer carbohydrates we consume, the leaner we will be. 10. By driving fat accumulation, carbohydrates also increase hunger and decrease the amount of energy we expend in metabolism and physical activity.