Source Naturals L-Arginine L-Citrulline Complex, Essential Amino Acid Supplement, Supports Peak Performance* 1,000 mg - 240 Tablets

L-Arginine and L-Citrulline are two amino acids bundled into a single powerful supplement. L-Arginine is an important factor in muscle metabolism and a precursor for nitric oxide, which promotes increased circulation by relaxing blood vessels. L-Citrulline helps the body rid itself of ammonia, a by-product of exercise. This clearing enables the body to recover after a workout.