A small study found that humans restricted to 11-hour per day eating schedule lost 3.5% body weight, improved energy, and sleep.

The study also found that the majority of participants eat on a 15-hour clock and are consuming more calories in the first 3 hours of the evening compared to the first 8 hours of the day. Previous studies have shown the positive effects have to do with the body’s internal clocks (called circadian rhythm) which regulate everything from metabolism to hormone production to repairing damage. Eating late in the evening throws off the internal clocks and wreaks havoc on metabolism.