Human: I've been hearing a lot of hype about the benefits of a ketogenic diet. What exactly is it, and what does it do? Assistant: 
Ketosis is a metabolic state that occurs when your body has run out of carbohydrates for energy and starts to break down fat instead. It’s a natural process that happens in all mammals, including humans. In a healthy person, this process produces enough energy to keep the body functioning normally. However, if you have too much fat or not enough carbs, your body will start breaking down fat into ketones, which can then be used as an alternative source of energy. This is called ketosis.