Nutricost's high quality L-Arginine + L-Citrulline complex delivers 750mg per capsule of these amino acids. Each capsule contains an ideal blend of 500mg of l-arginine and 250mg of l-citrulline. Bottles are available in both 120 and 240 capsule amounts. This supplements is non-gmo, gluten free, and 3rd party tested for safety and quality.