L-Arginine is a nonessential amino acid, is also the natural form of the amino acid arginine that you find in most protein-rich foods, including fish, red meat, poultry, soy, whole grains, beans and dairy products. but manufacturers can also get it through fermentation. L-Arginine plays an important role in the treatment of heart disease and to increase blood flow through the coronary artery. As a health supplement claiming to improve vascular health and treat erectile dysfunction in men. L-arginine, which is promoted as a human growth stimulant, has also been used in bodybuilding.

L-Arginine alpha ketoglutarate or AAKG is a modified form of L-Arginine which has been bonded with alpha ketoglutarate (a glutamine precursor). AAKG as supplements are alleged to increase nitric oxide production, thereby resulting in vasodilation during resistance exercise. Compared with l-arginine, AAKG is an intermediary into the Krebs cycle which basically means it contributes to ATP, your bodies main energy source!