Yamamoto® Nutrition Arginine PRO is an L-Arginine dietary supplement, recommended in cases of an increased need of L-Arginine, especially for sportsmen and women who take part in strenuous physical activity. The product is 100% Kyowa® brand Arginine HCL, a guarantee of quality. The brand Kyowa Quality (KQ®) is made up of a wide range of ultra-pure amino acids and related compounds provided by Kyowa® Hakko BIO Co. LTD., a global leader with over 60 years of experience and a reputation for strict quality assurance. With its innovative fermentation technology, developed over the years. Kyowa® has become a trusted pioneer in the health field. L-Arginine is a nonessential amino acid, which means that in normal conditions it can be synthesised by the human body to meet its needs. In case of poor nutrition or heavy physical activity, the body is no longer capable of producing enough Arginine, so a certain amount should be consumed via diet or supplements. Being the only precursor of nitric oxide (NO) and an important precursor to Creatine, Arginine supplementation is common among athletes and bodybuilders.