The ketogenic diet is a really low carb, high carb diet which shares several similarities with the Atkins and low carb diets.
It entails radically reducing carbohydrate consumption and substituting it with fat. This decrease in carbohydrates puts the system into a metabolic state called ketosis.
While this occurs, your system gets exceptionally effective at burning fat. Additionally, it turns fat into ketones from the liver and could provide energy for your mind