RFK Jr. claims he lost 20 pounds in 20 days, gained mental clarity on extreme diet

Health and Human Services Secretary Robert F. Kennedy Jr. revealed the details of his extreme, highly restrictive diet centered on meat and fermented foods.

"I’m on a carnivore diet," Kennedy said during a recent interview on USA TODAY's "The Excerpt" podcast.

Kennedy said he follows the diet the "whole day," every day.

DOCTORS DIVIDED OVER NEW DIET TREND THAT HAS BABIES LICKING BUTTER AND GUMMING RIBEYE STEAK

"That may not be right for other people, but I lost 40% of my...