Ketoscience Keto Burn Dual-Action Fat Burner may help you reduce hunger and promote weight management by burning fat. Keto Burn also includes caffeine to promote energy. The keto lifestyle limits carbohydrate intake in order to stimulate your body’s natural ability to use energy it has stored as a reserve. Your body produces natural ketones as an alternative energy source to glucose when you limit carbohydrate intake. Without enough glucose, your body begins breaking down fat for energy, which is known as “ketosis.” This allows you to burn more fat naturally.