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 2 years 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 transplant] i always wanted long hair.

      in Transplants  448 upvotes 6 days ago
      A user shared their experience with hair loss and a hair transplant at the Scandinavian Hair Institute, using finasteride every other day as part of their regimen. They expressed satisfaction with the transplant results and decided against using minoxidil due to its inconvenience and potential side effects.

      community Does anyone think their hair loss is thyroid related?

      in Chat  10 upvotes 1 week ago
      Hair loss may be linked to thyroid issues, with some individuals noticing changes in hair texture when taking substances affecting the thyroid. Treatments mentioned include a topical mix of finasteride, minoxidil, and tretinoin, along with microneedling.

      community Life with hair is so different. Save your hair!

      in Update  607 upvotes 1 week ago
      Hair restoration treatments like finasteride, minoxidil, dutasteride, and hair transplants can greatly enhance self-image and dating life. Opinions differ on whether to embrace baldness or pursue treatments for maintaining hair.

      community Hair Loss & Lipids: Why you have sebderm, folliculitis, LPP, inflammation, etc...

      in Research/Science  129 upvotes 1 week ago
      Excess sebum rich in cholesterol and triglycerides can lead to hair loss through inflammation, with treatments like Ciclopirox shampoo, Benzoyl Peroxide shampoo, and Clindamycin gel recommended for managing conditions like seborrheic dermatitis and folliculitis. Pioglitazone is suggested for Lichen Planopilaris, while Omega-3s and reducing processed foods may improve sebum quality, though genetic factors play a significant role.

    Similar Research

    5 / 1000+ results