What is a ketogenic diet?

    Last Updated: May 16, 2025

    The ketogenic diet is a nutritional strategy that is characterized by high fat, moderate protein, and low carbohydrate intakes; it typically recommends 50 grams of carbohydrates per day or less. This low carbohydrate intake induces a metabolic state similar to fasting, which promotes fat utilization and the production of ketone bodies.

    The ketogenic diet is a nutritional strategy that focuses on high fat intakes, moderate protein intakes, and a low carbohydrate intake. The low intake of carbohydrates simulates a metabolic state that resembles fasting, leading to a higher use of fat as a fuel source. This process produces ketones and gives the diet its name.

    Most frequently, the ketogenic diet approach aims for 50 grams of carbohydrates per day (or less) from vegetable sources. Some people might require less than 50 grams to cause ketosis, and other people might be able to consume slightly higher amounts of carbohydrates and still maintain a ketotic state.[1][2]