Pyridoxine is one of the vitamins of the B6 complex; present in many foodstuffs (yeast, liver and cereals). Pyridoxine has a role in transporting protein Bsu1, Pyridoxine contributes to thiamine uptake; characterization of thiamine (vitamin B1) transporter Thi9 from Schizosaccharomyces pombe. Pyridoxine is also an intermediate in synthesizing 4-Pyridoxic Acid-d3 (P991877), an isotope labelled analog of 4-Pyridoxic Acid (P991875); which is a catabolite of vitamin B6 (P991735). Also a water-soluble B-group vitamin that can be used as a urinary diagnostic biomarker for determining the nutritional status of these vitamins.