Differential Effects of Caffeine on Hair Shaft Elongation, Matrix and Outer Root Sheath Keratinocyte Proliferation, and Transforming Growth Factor-β2/Insulin-Like Growth Factor-1-Mediated Regulation of the Hair Cycle in Male and Female Human Hair Follicles In Vitro

    May 2014 in “ British Journal of Dermatology ”
    Fischer Tw, Erika Herczeg-Lisztes, Wolfang Funk … Ralf Paus
    Studysummary This study found that caffeine enhanced hair growth and keratinocyte proliferation in human hair follicles, with female follicles showing greater sensitivity than male ones.
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    Research cited in this study 12

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