*Nature’s Velvet L-Arginine is an Amino Acid. Supplementation of l-arginine may assist with improved blood flow. This ensures more blood reaches your organs and muscles. And help the body’s recovery process too. No Additives. No Fillers. Pure Powder Provide Support for Healthy Immune System Maintains Blood Sugar Levels Used for athletic energy & stamina Mens Wellness for Muscle Building and Endurance Not just increasing Blood flow, Arginine Also Supports Energy Level. As it is an important precursor of nitric oxide (NO) it plays a role in the dilation of blood vessels.