Jocko Willink's diet

Averages a 24-hour fast about every two weeks and a 72-hour fast about once a quarter. Drinks plenty of tea and chews sunflower seeds while fasting.

Willink told Business Insider he eats a mostly Paleo-style diet because that is when he performs well. He fasts periodically, though not on a strict schedule.

“That's when I perform well.”Jocko Willink

Source: A retired Navy SEAL commander who sometimes goes 72 hours without food explains the diet philosophy that keeps him in fighting shape (article)

Asked by TheBlaze about his diet, Willink joked that he mostly eats steak.

“I eat steak primarily.”Jocko Willink

Source: Want to Eat and Train Like an Elite Navy SEAL? Jocko Willink Reveals How He Keeps His Body Combat-Ready (article, 22 May 2016)