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
    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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