L-Arginine Our L-Arginine is a high-quality, non-essential amino acid involved in several biochemical processes within the human body, including muscle metabolism, hormone secretion, ammonia detoxification and normal immune function. Arginine also supports the production of nitric oxide, which plays an important role in blood flow, circulation and muscle performance. Recommended Use Take 4 g approximately 30 minutes before training. It may be mixed with Experiment pre-workout. Product Benefits Supports normal protein synthesis. Promotes blood flow to muscle tissue. Supports normal circulatory function. Supports nitric oxide production. Contributes to normal muscle metabolism and physical performance. Ingredients L-Arginine. Nutritional Information Serving size: 4 gServings per container: 75 Active ingredient Amount per serving %NRV* L-Arginine 4,000 mg — *NRV: Nutrient Reference Value not established.