There are very few carbohydrates, lots of fats, and lots of proteins: these are the basic principles of the ketogenic diet, a diet that, born as a therapeutic protocol against epilepsy, has become increasingly popular as a diet for weight loss. The variants of the keto diet, very fashionable today, are many, all united by the cutting of carbohydrates as a "trick" to ensure that the body uses fat as fuel instead, with the result of losing weight.