Supplements
Vitamin B Complex
Evidence ratingModerate
A collective term for eight B vitamins. Reviews describe each as an essential coenzyme in mitochondrial ATP production, the TCA cycle, fatty-acid β-oxidation, and amino-acid metabolism. Deficiency causes neurological symptoms, dermatitis, or anemia, but added benefit for already-replete healthy people is limited. Being water-soluble, excess is excreted and toxicity risk at usual doses is low.
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Effects reported in research
Functions as a coenzyme in energy metabolism (ATP production, TCA cycle, etc.)
In deficient people (vegetarians, older adults, heavy drinkers), supplementation is reported to improve deficiency symptoms
Dosage & timing
- For already-replete people it is more of an 'insurance' measure; it is most meaningful for those at higher deficiency risk (vegetarian, older, heavy drinkers).
- Check the product's amounts and stay within upper limits.
Cautions
- •Water-soluble with low accumulation toxicity, but long-term B6 intake above 50 mg/day has been linked to peripheral neuropathy (numbness).
- •People on medication or with medical conditions should consult a doctor.
- •This site is for educational reference only.
Supporting research
Last checked: 2026-06-25