Evolution Nutrition L-Leucine, Unflavored, 2000 mgEvlution Nutrition LLeucine 2000 mg is a branchedchain amino acid supplement designed to support muscle building and maintenance. LLeucine is essential for promoting muscle protein synthesis, a key process in muscle growth and repair. This amino acid is crucial for boosting anabolic activity, which involves the construction of muscle and tissues. Since the human body cannot produce LLeucine, it must be obtained through diet or supplementation.