First let's understand the basic.
Any food substance that enters your body is used as fuel and either your body immediately uses it or stocks it to consume later.
When the fuel is stored as fat then the gaining weight starts.
Atkins diet suggests low carbohydrate recipes which means that you will eat enough carbohydrate for the day and as soon as your body does any effort it will automatically burn all the excess carbohydrates, the fuel stock in your body,.