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      learn Hair Transplant

      Hair transplantation moves DHT-resistant follicles from a donor area (back and sides of the scalp) into thinning or bald areas. Transplanted hair usually keeps growing long-term, but grafts can thin and surrounding native hair can keep thinning.

      learn Ketoconazole

      Antifungal shampoo; small studies suggest a possible modest benefit in pattern hair loss, but it is not approved for that use. Oral ketoconazole tablets are a different product with a boxed liver warning.

      learn Melatonin

      Sleep hormone. One small trial in 40 women and some uncontrolled studies suggest topical melatonin may affect the hair cycle, but evidence is weak.

      learn Caffeine

      Caffeine is used in hair cosmetics. Lab studies show effects on follicles, but human trials are few and mostly low quality.

      learn Saw Palmetto

      A plant extract with weak evidence for hair loss. In the one comparison study it did much less than finasteride, and it has its own side effects.

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