Vitamin B

Vitamin B refers to a group of eight chemically distinct, water-soluble micronutrients that are essential for cellular function, primarily serving as cofactors or coenzymes in a wide array of metabolic pathways [NIH Office of Dietary Supplements]. This complex includes thiamine (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), pyridoxine (B6), biotin (B7), folate (B9), and cobalamin (B12). These vitamins are vital for converting food into energy, synthesizing DNA, and maintaining neurological and cardiovascular health; for example, folate and B12 are critical for one-carbon metabolism and red blood cell production [StatPearls, 'Vitamin B Complex']. Because 'Vitamin B' is a collective term for multiple unrelated chemical structures rather than a specific protein, enzyme, or receptor, it is not considered a singular therapeutic target in drug discovery. Instead, specific enzymes in these pathways (such as dihydrofolate reductase) or the vitamins themselves are treated as targets for pharmacological modulation or supplementation [PubChem]. Deficiencies in various B vitamins lead to distinct clinical syndromes, including megaloblastic anemia, pellagra, and beriberi, while certain drugs like metformin and methotrexate are known to interfere significantly with their metabolism or absorption [PubMed, PMID: 24508208].

Other names

B-complex vitaminsB vitaminsVitamin B complex

Vitamin B components act as precursors for essential coenzymes (e.g., TPP, FAD, NAD, Coenzyme A, PLP, and Methylcobalamin) that bind to and activate enzymes involved in metabolic flux; drugs targeting these pathways typically function as antimetabolites or inhibitors of vitamin-dependent enzymes [StatPearls; PubChem].