L-Arginine HCL is an amino acid that builds up protein. This essential amino acid has many health benefits when consumed in doses larger than those acquired normally from diet. Average daily dietary intake of arginine is 5.4 grams that just fulfils minimal requirements of body for tissue repair, immune cell maintenance, and protein synthesis. L-Arginine is needed in the body to synthesize nitric oxide. There are many health benefits linked with proper nitric oxide metabolism. Nitric oxide also regulates blood flow. It enables arterial system to retain its youthful elasticity that may treat hypertension. Research shows that L-Arginine supports natural human growth hormone release from pituitary gland. It also supports muscle mass and can reduce body fat.