L-Arginine is an Amino Acid supplement in an Easy to Swallow, Rapid Release Capsule. Supporting Nitric Oxide Levels, Popular with Physically Active Men & Women, contributing towards Vascular Performance. DIRECTIONS: Take one to three capsules per day with a little water. INGREDIENTS: l-arginine hcl, shell (bovine gelatin, natural colouring (titanium dioxide)), anticaking agent (magnesium stearate).