The plan is a very low carb, high fat diet. In fact, this diet shares similarities to the Atkins diet. The Keto diet plan includes severely reducing your intake of carbohydrates and increasing the intake of fat. This reduction in carbohydrates puts your body into a metabolic state called ketosis where the diet gets its name from. When your body is in the state of ketosis, it is better to burn fat for energy. It also turns fat into ketones in the liver, which can supply energy to the brain.