The longer you go in a day without eating, the more good stuff happens in your body.

The pursuit of metabolic flexibility really is the holy grail of health. If you are metabolically flexible, everything else falls into place.

You can store about 500 grams of carbohydrates in your body ... That's 2,000 calories. You can store 2,000 calories of sugar in your body, but you store 3,000 calories in just a single pound of fat.

The ketone fire hose is not a function of added fat in your diet or any fat in your diet; it's purely a function of the deficit of exogenous glucose.

So, the way to do this and the way to develop metabolic flexibility is to cut the carbs, is to reduce the amount of glucose that your body has access to.

Metabolic flexibility is this capacity that the human body has to extract energy from from a variety of different energy substrates.

That's one of the realizations you come to when you become metabolic inflexible is we eat too damn much food. All of us do.

I do believe that that a time-restricted window for eating is optimal. So, I usually eat 1:30 or 2:00 o'clock in the afternoon—that's my first meal. Then, I'll eat dinner.