Variation in Human Hair Ultrastructure Among Three Biogeographic Populations

    November 2018 in “ Journal of structural biology ”
    Sandra Koch, Mark D. Shriver, Nina G. Jablonski
    Image of study
    TLDR Different populations have distinct hair structures related to their ancestry.
    The study investigated the ultrastructure of human scalp hair, focusing on the density and distribution of melanosomes, cuticle thickness, and the relationship between hair fiber ultrastructure and biogeographic ancestry. Using transmission electron microscopy (TEM), the researchers analyzed hair cross-sections from three metapopulations: European, African, and East Asian. They found significant variation in hair cross-sectional shape, cuticle dimensions, and melanosome distribution, with these traits showing statistically significant patterns related to ancestry. The results contribute to a better understanding of human hair morphology variation and lay the groundwork for future research on the genetic and developmental factors influencing hair ultrastructure.
    Discuss this study in the Community →

    Research cited in this study

    15 / 15 results

    Related Community Posts Join

    6 / 1000+ results

      community The MPB itch aka DHT itch is very real.

      in Chat  9 upvotes 1 year ago
      Hair loss itch is caused by DHT attacking follicles and stimulating nerves. Finasteride users who respond well don't experience this itch.

      community Hair density change in 7 months… unreal.

      in Progress Pictures  344 upvotes 1 week ago
      The user experienced significant hair density improvement over seven months using finasteride, topical minoxidil, Nizoral shampoo, and supplements like biotin and vitamin D. They also used a derma stamp with rosemary and peppermint oil, noting no side effects from finasteride.

      community Just a little hair humor for the weekend.

      in Satire  175 upvotes 2 weeks ago
      Hair transplants and hair loss treatments like oral Fin and Min are discussed, with some humor about public figures' hair. Missing a single day of these treatments typically has little impact, but longer gaps can affect results.

      community Hair transplant, 3 month progress

      in Is this regrowth?  213 upvotes 2 weeks ago
      The user experienced hair loss after a hair transplant and stopped using finasteride and minoxidil temporarily, as advised by their medical team. They resumed the treatments and are hopeful for regrowth, attributing the current hair loss to shock loss and shedding.

      community Buzz cut years after hair transplant?

      in Hair Transplants  87 upvotes 3 weeks ago
      The conversation discusses concerns about getting a buzz cut years after a FUE hair transplant due to an unnatural look and thinning hair. Suggestions include trying a buzz cut and considering scalp micropigmentation (SMP) as an option.

      community Hair shed after adding tretinoin with topical minoxydil

      in Minoxidil  3 upvotes 3 weeks ago
      Adding tretinoin to a minoxidil routine can cause initial hair shedding, which may be normal as it potentially increases minoxidil's efficacy. Users suggest being cautious with tretinoin application, especially around microneedling, to avoid increased systemic absorption.

    Similar Research

    5 / 1000+ results