Complete Arginine with N.O. Blast is an essential amino acid and clinical nutritional trials have shown that it really enhances your bodybuilding results. When you supplement with L-Arginine, it is very, very mild in the body. Most people don't even notice that they're taking it, but the back end of what it does is it helps us become way more buff, way more cut and push further in exercise. It is an essential part of most bodybuilders' nutritional supplement regimen.