Morphological Changes of Human Hair Related to Graying

    February 2019 in “ PubMed ”
    Lorena Bechthold, Erik Schulze zur Wiesche, Franz Wortmann
    TLDR Gray hair affects hair's movement and appearance, making it less bouncy and more wavy.
    The study investigated the morphological and mechanical changes in human hair associated with graying. Using both in vitro and in vivo methods, it was found that nonpigmented (gray) hair strands exhibited significantly lower relative amplitude and higher damping performance compared to pigmented hair. This was attributed to increased waviness, larger hair collective volume, higher fiber-fiber interactions, and greater air resistance. The findings highlighted that even small fractions of gray hair (≥5%) significantly impacted the dynamic movement and appearance of hair collectives, affecting the overall perception of hair.
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