Beyond raw chemistry labs l-arginine powder. Supports blood vessel tone. 30 servings  beyond raw chemistry labs l-arginine powder: provides 3gm of lab grade l-arginine powder per serving. L-arginine is an essential precursor of nitric oxide, which helps maintain blood vessel tone and plays a role in protein synthesis. Optimize blood flow: involved in creatine formation, l-arginine can influence the cardiovascular system through nitric oxide production and help fuel muscle cells. Be your own chemist: mix with your favorite beverage, add to your favorite pre-workout. Create your perfect formula using l-arginine powder other beyond raw chemistry labs products. Backed by science: since 1935, gnc has been committed to meeting the highest standards of quality, safety, and efficacy while applying the most up-to-date advances in nutritional science so you can live well. . Beyond raw chemistry labs l-arginine (30 servings)