Effects of Aging on Hair Color, Melanosomes, and Melanin Composition in Japanese Males and Their Sex Differences

    November 2022 in “ International Journal of Molecular Sciences ”
    Takashi Itou, Shosuke Ito, Kazumasa Wakamatsu
    Studysummary This study found that both Japanese male and female hair darkens with age, with significant sex differences in melanin composition and melanosome morphology influencing hair color.
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    Research cited in this study 6

    1. The Action of a Cosmetic Hair Treatment on Follicle Function bioRxiv (Cold Spring Harbor Laboratory) · 2018
    2. Androgenetic Alopecia: A Review Endocrine · 2017
    3. Relative Studies Between Hair Index, Hair Area, And Medullary Index With Age And Sex In Thai Scalp Hair Forensic science international · 2016
    4. Is Increased Constitutive Skin and Hair Pigmentation an Early Sign of Puberty? Homo · 2013
    5. Changes in Structure and Geometric Properties of Human Hair by Aging International Journal of Cosmetic Science · 2010
    6. Quantitative Studies on Human Hair Growth: Fundamental Measurements and Evaluation of Hair Growers Journal of Society of Cosmetic Chemists of Japan · 1994