The material we use is a mixture of pyridoxine and alpha-ketoglutarate, which contains 52.0% pyridoxine and 45.0% alpha-ketoglutarate.1Alpha-ketoglutarate is a intermediate of the Krebs cycle (Citric Acid cycle).2 It plays an important role in amino acid metabolism.3Nicotinamide is the amide of niacin. It has niacin activity.4