Don't Fear All Fats

“Unfortunately for generations of nonfat milk-drinking, chicken breast-eating Americans, (Ancel) Keys’ research is not only flawed, but there’s evidence that he manipulated his data to make sure that fat looked bad (bringing himself fame and grant money in the process). Even worse, there’s also evidence that SUGAR INDUSTRY BIGWIGS HAVE BEEN PAYING SCIENTISTS to shift the blame for obesity and chronic disease from sugar to fat since the 1960s.”

“Fat is a building block. Quality fats form strong cell membranes and help build sex hormones. Your brain is the most fat- and cholesterol-dense part of your body and it requires saturated fat to build myelin, the insulators that connect many of your brain cells to one another. Low-fat diets will starve your brain.”
Emphasis mine.

https://www.bulletproof.com/diet/weight-loss/how-fat-helps-manage-weight/