Limited evidence — saw palmetto is a weak natural DHT-blocker with modest results in small studies, far below finasteride.
Saw palmetto is thought to inhibit 5-alpha-reductase (the enzyme that makes DHT), the same target as finasteride — but far more weakly. Small trials, oral and topical, show some men get a modest improvement or slower loss. The studies are limited in size and quality, and head-to-head it doesn't approach finasteride's effect.
Bottom line: saw palmetto is a reasonable, lower-potency option if you specifically want to avoid prescription anti-androgens and accept smaller results. It's not risk-free (mild stomach upset, hormonal effects) — check with a doctor, especially if combining with other treatments, and don't expect finasteride-level regrowth.
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FAQ
Is saw palmetto as good as finasteride?
No. It targets the same DHT pathway but much more weakly, with smaller and less consistent results. It's an alternative for people avoiding prescription drugs, not an equal substitute.
Should I take saw palmetto orally or use it topically?
Both have been studied with modest results. Oral has more hormonal reach (and potential side-effects); topical is gentler. Evidence doesn't strongly favour one — discuss with a doctor if you have hormone-sensitive conditions.
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⚠️ When to see a doctor — don’t self-treat
- Sudden patchy or circular bald spots
- Redness, scaling, pus, pain or itch (possible scarring alopecia — treat urgently)
- Broken hairs or rapid loss
- Loss with body-wide signs (weight loss, fatigue, cycle changes, acne, extra hair)
- Loss right after a new medication
- Any hair loss in a child