SportAmino Acid SupplementKosherVegetarian | Gluten Free | Non-GMO | Lactose FreeSince 1996L-Citrulline is an amino acid that has numerous health and athletic performance benefits.During the past decade research on L-Citrulline has shown it plays an important role in nitric oxide production vascular health muscle protein synthesis ammonia elimination and immune function. L-Citrulline is converted to L-Arginine in the body to support L-Arginine and nitric oxide levels. Increased production of nitric oxide promotes vascular dilation which improves oxygen and blood circulation throughout the body. L-Citrulline can also improve heart health by increasing the strength of arteries. L-Citrulline also relieves muscle fatigue through ammonia elimination. L-Citrulline helps to rid the body of ammonia a toxic byproduct of protein metabolism and provides a readily available substrate for arginine production. L-Citrulline is involved in the formation of urea in the liver which plays an important part in the removal of waste created by the digestion absorption and metabolism of proteins.