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B7
Vitamins
Biotin (Vitamin B7)
B vitamin supporting hair, skin, and nail keratin production.
What it is
Biotin (vitamin B7) is a water-soluble B vitamin that serves as a cofactor for carboxylase enzymes involved in keratin production and energy metabolism.
How it works
Cofactor for carboxylase enzymes (ACC, PCC, MCC, PC); supports fatty acid synthesis and amino acid metabolism critical for keratin.
What the evidence says
Evidence for hair/nail benefits mainly in deficiency states; limited evidence for benefit in non-deficient individuals.
Safety Notes
- IMPORTANT: High-dose biotin (>5000 mcg) can cause false results on troponin, thyroid, and other lab tests. Discontinue 48-72h before blood work.
- anticonvulsants: Some anticonvulsants deplete biotin; supplementation may be beneficial.