TITAN Native Whey Protein Isozero is arguable the cleanest, least processed whey protein available, Native Whey Protein Isozero has unique functional and compositional properties compared to traditional cheese whey. Native Whey Protein Isozero contains an inherently high concentration of the branched chain amino acid, leucine, which is probably the most important amino acid to human physiology and performance. Leucine is the anabolic trigger that stimulates the body to release natural insulin, and promotes protein synthesis, which leads to increased muscle mass and body strength. It is also higher in the amino acids: tryptophan and cysteine. Tryptophan increases serotonin, which helps support endurance during exercise. Cysteine is a a pre-cursor to the most abundant and naturally occurring anti-oxidant in the body – glutathione.