The Keto diet is a high-fat, adequate-protein, low-carbohydrate diet with a daily goal range of 70-80% calories from fat, 10-20% from protein, 5-10% from carbs. The keto diet calls for a daily intake of just 20 to 50 grams of carbohydrates. A person following this high-fat, low-carb diet achieves a state of ketosis, a metabolic state that forces your body to switch its fuel source from carbs to fat. It breaks down fat into ketone bodies that are used as energy.