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Evidence Verdicts
Every popular hair-loss product gets a structured Evidence Verdict — including (especially) the ones that don't work. We cite peer-reviewed studies, score on a 5-dot scale, and redirect debunks to the proven alternative. We earn the right to recommend by being willing to debunk.
No paid placements. Buy links are affiliate-tagged where noted; revenue goes to the recommended product, not the debunked one. Always consult a licensed physician before starting or changing any medication.
Recommended
Oral
Generic
DHT blocker. Strongest prevention evidence — discuss side-effect profile.
Topical
Generic
The most-studied topical. Works; requires daily commitment.
Oral
Avodart
Stronger than finasteride. Off-label for AGA; physician-supervised only.
Topical
Nizoral
Adjunct, not primary. Modest anti-androgen scalp effect.
Not recommended
Every page below explains what the brand claims, what the evidence actually shows, and what we recommend instead.
Shampoo
Alpecin / Plantur / others
In-vitro caffeine effects are real. Translating them via a 2-minute scalp wash is not. Minimal clinical evidence.
Topical (essential oil)
Various essential-oil brands
One 2015 study compared it to minoxidil 2% with subjective endpoints. Hyped far beyond what the evidence supports.
Supplement
Generic / multiple
Marketed as a 'natural DHT blocker.' Weak inhibitor at best; clinically inferior to finasteride in every head-to-head study.
Supplement
Generic / multiple
No clinical effect on hair loss in non-deficient adults. The single most over-marketed supplement in the category.
Device
Various consumer brands
Clinical microneedling works at 1.5–2.5 mm with adjuncts. Consumer rollers at 0.5 mm don't reach the bulge stem cells. Not the same intervention.
Topical (folk remedy)
Various 'Ayurvedic' / DIY
A folk remedy with a single small 2002 study and no replication. Heavily marketed in India; clinically unproven.
10 products reviewed · 4 recommended · 6 debunked. Buy links are affiliate-tagged where noted.
The Hair Library is an independent aggregator. Content is for educational purposes only and is not medical advice. Results vary by patient, technique, and clinician. Always consult a qualified hair-restoration physician before making treatment decisions. Review counts and audit dates are disclosed on every clinic page.