ingestible · for hair thinning & hair loss
Biotin (Vitamin B7)
Reviewed by the Nimbera editorial team · Last updated May 2026
How to use
Biotin supplementation is most appropriate when blood work confirms low biotin levels or risk factors for deficiency are present (prolonged raw egg consumption, long-term antibiotic use, biotinidase enzyme deficiency, or certain anticonvulsant medications). If your physician has identified deficiency, typical supplemental doses range from 2,500-5,000 mcg daily. Dietary biotin sources - eggs, salmon, nuts, seeds, and sweet potato - should be the first approach. Ask your doctor to test serum biotin before supplementing.
How it works
Biotin (vitamin B7) is a water-soluble coenzyme essential for fatty acid synthesis, amino acid metabolism, and gene expression - all processes relevant to rapidly dividing hair follicle cells. When biotin is genuinely deficient, these cellular processes slow and hair loss can occur. Supplementation reverses deficiency-driven hair loss. Without an underlying deficiency, extra biotin does not enhance normal hair follicle function beyond baseline.
Where to buy
Widely available at pharmacies and grocery stores. Common brands: Nature's Bounty, Natrol, Solgar. Standardized doses of 2,500 mcg and 5,000 mcg tablets are typical.
Typical cost: $8-$20 for a 60-120 day supply at standard doses
Safety notes
Biotin supplementation at doses of 5,000 mcg or more can cause false laboratory test results - it interferes with thyroid hormone assays, troponin tests (used to diagnose heart attack), and other hormone panels using biotin-streptavidin technology. Inform all healthcare providers and labs that you are taking biotin before any blood draw. Stop biotin at least 72 hours before blood tests if possible. Raw egg whites contain avidin which binds and blocks biotin absorption - cook eggs before eating.
Drug & supplement interactions
- Always tell your doctor or pharmacist about any supplements you take.
- Interactions can occur with prescription medications, blood thinners, and immunosuppressants.
- Herbal remedies can affect how the body absorbs or metabolises drugs.
- Check drugs.com interactions checker before starting.
Clinical source
Patel DP et al. A Review of the Use of Biotin for Hair Loss. Skin Appendage Disord. 2017.This information is compiled from primary clinical literature and is for informational purposes only. It is not a substitute for professional medical advice. Read our full disclaimer.