> I'm pretty sure the scientist that time knew that fat on its own is not the issue(wet to getting more fat) when calories are controlled. The calorie model wa

> I'm pretty sure the scientist that time knew that fat on its own is not the issue(wet to getting more fat) when calories are controlled. The calorie model was well established, so yes, they knew that you'd still get fat if you ate as much calories. But both scientists and doctors absolutely did believe that reducing fat consumption would directly reduce the incidence of heart disease regardless of body weight. The same thing happened later when it was believed that consuming cholesterol, or even later LDL, would increase the risk of high blood cholesterol and thus atherosclerosis. This led to things like doctors and large medical bodies recommending margarine instead of butter as a health food(!). There has been plenty of terrible advice coming directly from nutrition science and medical bodies influenced by it. Most likely even current advice will turn out to be nonsensical as we learn more.