Keto weight loss pushes the body into ketosis where the body switches to fats for its energy production. Typically, carbohydrates are the prime source of obtaining energy, but when a person is on a keto diet, he limits carbs intake and increases fat intake. This way the body becomes dependent on fats and it uses the fat cells of the body, to make energy. Within days, the stubborn fat layers around the stubborn body areas melt, leaving behind a slimmer body.