Used as a coenzyme in amino acid metabolism, particularly in transamination, decarboxylation, and racemization reactions. Plays a key role in the synthesis of neurotransmitters such as serotonin, dopamine, and GABA, making it important in neurological function. Involved in hemoglobin synthesis and red blood cell function, supporting oxygen transport. Also participates in glycogen breakdown by activating glycogen phosphorylase. Used in some clinical settings to support treatment of certain metabolic disorders, anemia, and seizure disorders, especially those related to vitamin B6 metabolism. Commonly included in nutritional supplements and vitamin formulations for its role in energy metabolism and overall cellular function.