Agmatine sulfate is best known for its ability to help build muscle and is a great Nitric Oxide Supplement! When used in conjunction with weight lifting and resistance exercises, agmatine may help fuel muscle growth through a few different mechanisms. It stimulates the production of luteinizing hormone which may positively impact testosterone levels. It may also help regulate the enzyme responsible for the production of nitric oxide, which is important for delivering nutrients to muscle tissue. It may help increase appetite, which is useful for bodybuilders.