There is an ongoing debate as to how to lose weight. The calorie restriction method says to eat less. The Hormone theory says this is too simplistic and advocates fasting, or time restricted eating. Which is correct?
Calorie Theory
Fat = calories in – calories out
This equation is critical to the calorie Theory
The calorie theory says that to reduce fat you need to reduce calories in (what you eat) to less than calories out (what you burn). People are encouraged to eat less in order to lose weight. For example if you eat 100 units and burn 200 units, your body will then use 100 units of fat to make up for the shortfall, and you will lose weight.