The Vitamin Shoppe L-Arginine 500mg Capsule a free-form amino acid. Arginine is involved in the production of nitric oxide (NO), which plays a role in controlling blood pressure and boosting immunity. It also helps in controlling muscular activity and regulating erections. | Key Ingredients: Vitamin B6(Pyridoxine Hcl) L-Arginine(As Arginine Free Base) | Key Benefits: Retains nitrogen inside body and controls cholesterol L-Arginine, known as the body’s building block, makes proteins in your body This protein is converted into nitric oxide that causes your blood vessels to dilate that improves your blood flow L-Arginine is also absorbed readily by pituitary glands, liver and male sexual organs and also improves your immune system The formula reduces the severity of common cold, improves kidney function and athletic performance | Directions for use: As a dietary supplement, take one capsule daily, preferably in between meals. | Safety Information: Read the label carefully before use Keep it out of reach of the children Store in a cool and dry place away from direct sunlight Use under medical supervision