BIGMUSCLES NUTRITION Xtreme Muscle Fusion features a protein source with one of the highest biological values and is easy to digest, mix, and absorb. It is a combination that ensures active muscles are fed for hours with the most complete blend of proteins available. It is enhanced with core ingredients clinically shown to build more muscle and strength than whey protein alone. It is a lean generating protein, Our Multi layered protein blend utilizes multiple individual proteins, each with varying digestive rates and distinct amino acid profiles.