What is the Keto Diet? At its core, the keto diet is a high-fat, moderate-protein, and very low-carbohydrate eating plan. The primary goal of the keto diet is to shift your body's metabolism from relying on glucose (derived from carbohydrates) for energy to burning fat for fuel. This metabolic state is called ketosis. Normally, the body breaks down carbohydrates into glucose, which is used for...