ANTHONY CHAFFEE, MD: Remember that your hormones like testosterone and estrogen are made out of cholesterol, and avoiding fat will make all hormones suffer. Eating carbs raises insulin and insulin resistance, which suppresses testosterone in men and estrogen in women.

The low-fat carnivore trend falsely claims to mimic an ancestral diet. This is wrong.
​Ancestors ate high-fat megafauna (mammoths); hunters today still target fat-rich animals (whales, seals, polar bears). Even Arctic fish are fat-rich. Larger animals, especially Arctic species… pic.twitter.com/QIGvz2pNJf

— Anthony Chaffee, MD (@anthony_chaffee) October 18, 2025