Precursor for synthesis of nitric oxide (NO). stimulates growth hormone (GH). improves immune function. Increases muscle mass. Arginine is considered a semi-essential amino acid. What that means is the body produces arginine normally, but sometimes it needs more than what is available. Food sources such as peanuts and almonds are natural sources of Arginine, but for those looking to enhance athletic performance or increase lean muscle mass, It is difficult to derive the amount required by the body in optimal results from food sources. Recent University level research confirms arginine's ability to act as a natural precursor to creatine synthesis in the body. It has also been shown to increase natural levels of growth hormone and increase the body's ability to consume and utilize oxygen, primarily due to its ability to increase levels of nitric oxide (increases vasodilation). all max arginine is an ultra pure form of Arginine - produced in a Pharmaceutical Grade and government inspected facility. An exclusive 11-stage process derives this powerful amino monopeptide from a pure vegetable base. This means no potential animal contamination and no Animal by-product sources can be found in all max arginine.