GNC L-Arginine 1000 mg is a premium amino acid supplement designed to support cardiovascular health and athletic performance. Each serving delivers 1000 mg of pure L-Arginine, an essential amino acid that promotes nitric oxide production for improved blood flow and oxygen delivery to muscles. Ideal for fitness enthusiasts and those seeking natural circulatory support, this formula helps enhance endurance, recovery, and overall vitality. Trust GNC's decades of nutritional expertise for quality supplementation.