USN's Muscle fuel promoting tissue growth and development is a scientifically engineered muscle building MRP supplement, formulated for athletes that are serious about building muscle mass. Muscle Fuel promoting tissue growth and development has been optimized with key muscle building nutrients to help you grow faster and recovery quicker. Containing everything you need to pack on size in one convenient all in one formula, Muscle Fuel promoting tissue growth and development sets a new standard in performance nutrition. It should not be used by persons under the age of 18 years. It should not be used for weight loss. It is only for bodybuilders and athletes or individuals on a mass gaining plan.