The ketogenic diet is a low-carb, high-fat diet that follows the Atkins and low-carb diets in many ways. It entails dramatically lowering carbohydrate consumption and substituting fat. This drop in carbs allows the body to reach a metabolic condition known as ketosis. Your body becomes extremely good at burning fat for energy as this happens. It also transforms fat to ketones in the liver, which can provide the brain with energy (6Trusted Source). Ketogenic diets can lower blood sugar and insulin levels significantly. This, together with the increased ketones, has a range of health advantages.