Biotin, Vitamin B7, Vitamin H, Coenzyme R

  • Physiology
  1. Water-soluble B-Vitamin
  2. Biotin deficiency may manifest as hair thinning
  3. Only small amounts of Biotin are needed and deficiency is rare
  • Precautions
  1. No high quality evidence for Biotin supplementation
  2. Many OTC products contain high dose Biotin (>5000 mcg/day)
    1. High dose Biotin is found in hair, skin or nail products
    2. Low dose Biotin (e.g. 30 mcg in Multivitamins)
    3. High dose Biotin Interferes with lab assays (see below)
    4. Hold Biotin 3 days before lab testing
  • Labs
  • High Dose Biotin (>5000 mcg/day) falsely LOWERS lab levels
  • Labs
  • High Dose Biotin (>5000 mcg/day) falsely RAISES lab levels
  • References
  1. (2018) Presc Lett 25(2)