Effectiveness and Safety of Hair Growth Formulation Containing Tectona Grandis L.f (Teak) Leaf Extract: A Randomized, Double-Blind, Placebo-Controlled Study on Males with Androgenic Alopecia

    Nutchaninad Tanuphol, Neti Waranuch, Vanuchawan Wisuitiprot, Wudtichai Wisuitiprot, Kamonlak Insumrong, Prapapan Temkitthawon, Nungruthai Suphrom, Katechan Jampachaisri, C. Girard, Kornkanok Ingkaninan
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    TLDR Teak leaf extract may effectively and safely promote hair growth in males with androgenic alopecia.
    The study investigated the effectiveness and safety of a hair growth formulation containing 1% teak leaf extract (HT-teak) in 81 males with androgenic alopecia over 24 weeks. It was a randomized, double-blind, placebo-controlled trial comparing HT-teak with 5% minoxidil and a placebo. Both HT-teak and minoxidil significantly increased target area hair count and the anagen-to-telogen ratio while reducing hair shedding, with no significant changes in the placebo group. HT-teak users reported the highest satisfaction scores, and no adverse effects were noted. The study concludes that teak leaf extract is a potentially effective and safe alternative for promoting hair growth in individuals with androgenic alopecia.
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