L-arginine is an amino acid which, as a precursor of nitrogen monoxide, can indirectly increase the cross-section of blood vessels, thus it ensures a proper blood flow. We recommend AAKG 7800 if you: want to improve your training performance without stimulants do long-term endurance sports seek a conveniently packaged, ready-to-drink pre-workout product Like all BioTechUSA products, AAKG 7800 consists of safe and carefully selected ingredients.