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The ketogenic diet––also known as the “keto diet” or “very-low-carbohydrate ketogenic diet”–– helps your body enter a metabolic state called nutritional ketosis. Achieving this state involves consuming a high-fat, moderate-protein, very low-carbohydrate diet. In ketosis, your body shifts its metabolism, focusing on using fat for energy, which leads to the production of ketone bodies as an alternative fuel source.