Nature's Bounty L-Arginine 500mg is an amino acid supplement that comes in a bottle containing 50 capsules. L-Arginine is a conditionally essential amino acid that plays important roles in protein synthesis and various metabolic functions in the body. L-Arginine is an amino acid that the body can typically produce on its own, but supplementation may be beneficial in certain circumstances. The product comes in a characteristic green Nature's Bounty bottle with clear labeling indicating the dosage of 500mg per capsule. The bottle contains 50 capsules for convenient daily supplementation. As with all supplements, this product should be taken as directed on the label.