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Biotin
Aka: Biotin, Vitamin B7, Vitamin H, Coenzyme R
- Physiology
- Water-soluble B-Vitamin
- Biotin deficiency may manifest as hair thinning
- Only small amounts of Biotin are needed and deficiency is rare
- Precautions
- No high quality evidence for Biotin supplementation
- Many OTC products contain high dose Biotin (>5000 mcg/day)
- High dose Biotin is found in hair, skin or nail products
- Low dose Biotin (e.g. 30 mcg in Multivitamins)
- High dose Biotin Interferes with lab assays (see below)
- Hold Biotin 3 days before lab testing
- Labs: High Dose Biotin (>5000 mcg/day) falsely LOWERS lab levels
- Thyroid Stimulating Hormone (TSH)
- Beta-HCG
- Procalcitonin
- Troponin
- Labs: High Dose Biotin (>5000 mcg/day) falsely RAISES lab levels
- Serum Free T3
- Serum Free T4
- Serum Folate
- References
- (2018) Presc Lett 25(2)