<human>: I've been hearing about a new diet fad. Can you tell me more about it?
<bot>: The latest diet trend is the ketogenic diet. It’s based on the idea that when your body is in a state of ketosis, it can burn fat for energy instead of carbohydrates. This means that the body will produce ketones as its main source of fuel instead of glucose. Ketogenic diets have been used to treat epilepsy and some types of cancer, but there isn't enough evidence yet to say if they are effective at weight loss.