Support your active lifestyle with these premium Super Strength L-Arginine capsules from premium supplements provider Swanson Health. L-arginine is an essential amino acid and precursor to nitric oxide. Each handy capsule is packed with 850mg of L-arginine - take anytime during the day to help reach your fitness goals. Support your active lifestyle with these premium Super Strength L-Arginine capsules from premium supplements provider Swanson Health. L-arginine is an essential amino acid and precursor to nitric oxide. Each handy capsule is packed with 850mg of L-arginine - take anytime during the day to help reach your fitness goals. 850mg of L-arginine per capsule. Precursor to nitric oxide. 90 capsules per pack Amino acids are the building blocks of protein. L-arginine is an essential amino acid found in seafood, watermelon, nuts and meat. We also produce L-arginine in the liver but use it all up preventing the concentration of arginine in the blood from reaching significant levels. Swanson Health\'s premium 850mg capsules are an easy way to top up the amount of L-arginine in the body. Experience Full Spectrum Strength L-Arginine with this supplement by Swanson Health! One capsule contains 850mg of L-Arginine. Try it now!