Biology is smart. Historically, it permitted our bodies to adjust to times of wealth or deficiency by moving from carbohydrate metabolic rate to fat metabolic process.
When we found great deals of wild fruit, we would certainly keep the carbohydrates as tummy fat. Later on, in lean times, we would utilize the fat as a backup source of gas.
The key is this: Eating fat does not make your insulin go up, as consuming carbohydrates or healthy protein does. The keto diet does not increase your insulin, and you do not keep fat. Instead, you burn it, producing the ketones that provide you an effective and also efficient metabolic jolt.