Science - Innovation - Quality - ResultsFree ScoopStimulates Protein SynthesisPreserves Lean Muscle MassPromotes Muscle RecoveryPurity & Potency TestedQuality GuaranteeDietary SupplementGluten FreecGMP Registered FacilityLab Tested Every LotKosher CertifiedProfessional Grade Leucine is likely the best single ingredient supplement on the market to build hard, lean, dense muscle, fast Leucine is an Essential Branched Chain Amino Acid (BCAA) that is known throughout bodybuilding as the ultimate muscle-builder. It's considered essential because your body cannot produce it, so it must be supplied by your diet. Leucine activates an anabolic pathway called the mTOR which stimulates muscle protein synthesis. By increasing Leucine consumption the mTOR pathway is activated and protein synthesis is increased. Simply stated, Leucine is essential for achieving a positive nitrogen balance and building lean muscle mass. The Allmax Advantage: Allmax brings you the purest and most powerful crystalline Leucine powder with zero binders, excipients, additives or preservatives. In the final stage of Leucine production, the result is a coarse crystalline structure. We've taken the raw crystal material and microparticulated it through a complex series of processes, resulting in perfect, ultra-fine white powder that has optimal absorption levels.