Pure Encapsulations l-Arginine Supports Nitric Oxide Production and Healthy Blood Flow L-Arginine supports nitric oxide formation, which is important for healthy dilation of blood vessels, circulation, and blood flow. In trials, L-Arginine has demonstrated the potential to support endothelial function, platelet function, and exercise tolerance. L-Arginine is contraindicated for individuals with the herpes virus. Key Benefits and Features: Ages 18 and up Healthy blood flow and circulation Supports nitric oxide formation, which is important for healthy dilation of blood vessels, circulation, and blood flow Supports cardiovascular health Clinically tested Made with high-quality vegan ingredients backed by verifiable science Ingredients Serving Size: 2 Vegetarian Capsules Amount/Serving Calories 5 L-Arginine HCI (free-form) 1,400 mg Other Ingredients: Vegetarian capsule (cellulose, water). Does Not Contain: Wheat, soy, dairy, eggs, artificial colors, artificial sweeteners, coatings, shellacs, GMOs, tree nuts, peanuts, sesame, unnecessary binders, fillers, preservatives, magnesium stearate, gluten, trans fat, and hydrogenated oils. Gluten Free, Non-GMO, Vegan, Vegetarian, Hypoallergenic Suggested Use As a dietary supplement, take 2 capsules, 1-3 times daily, between meals. Warning: If you are pregnant or lactating, have any health condition, or are taking any medication, consult your health professional before use. Storage: Store in a cool, dry place. More Info. L-Arginine HCl is derived from the fermentation of soy and other vegetable sources and is ultrafiltered and highly purified.