B₁ (thiamine: TPP)B₂ (riboflavin: FAD, FMN)B₃ (niacin: NAD⁺)B₅ (pantothenic acid: CoA)B₆ (pyridoxine: PLP)B₇ (biotin)B₉ (folate)B₁₂ (cobalamin)C (ascorbic acid)

- All wash out easily from body except B₁₂ (stored in liver for ~3-4 years) and B₉ (stored in liver for ~3-4 months).- B-complex deficiencies often result in dermatitis, glossitis, and diarrhea.- Can be coenzymes (eg, ascorbic acid) or precursors to organic cofactors (eg, FAD, NAD⁺).