Our brain, and the different organs in our body have behave differently at different times of the day.
In order that everything works like it should, and to prevent peak of energy in the middle of the night when we want to sleep, organs have biological clocks that direct their actions
These clocks set a lot of things in our body. If we tune them correctly and sync our behavior to them, a lot of functions in the body improve
If we set ourselves to our natural clocks our metabolism improves greatly! This is the field of research of Professor Oren Froy