Used as a coenzyme in amino acid metabolism, particularly in transamination reactions where it helps convert amino acids into other amino acids or keto acids. Plays a key role in the biosynthesis of neurotransmitters such as serotonin, dopamine, and GABA, making it important for nervous system function. Also involved in glycogenolysis by supporting the activity of glycogen phosphorylase, the enzyme that breaks down glycogen. Applied in research and pharmaceuticals for studying enzyme mechanisms and treating conditions related to vitamin B6 deficiency. Shows potential in inhibiting advanced glycation end-products (AGEs), suggesting use in managing diabetic complications and age-related diseases.