According to numerous studies, intermittent fasting is the most effective method of weight loss. Unfortunately, few people can go without food for 5, 8, 12 or even 24 hours at a time. When you don't eat for hours, a switch is activated telling your body to burn any fat reserves and destroy old cells that aren't working properly. This triggers a regeneration process that not only supports weight loss, but also renews every cell in your body, making you look years younger.