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    Did you mean Pohl-Pinkus constrictions?
    GlossaryPohl-Pinkus constrictions

    narrow, weakened areas on hair shafts from growth disruptions

    Pohl-Pinkus constrictions are narrow, weakened areas along the hair shaft that can occur due to temporary disruptions in hair growth, often caused by physical or emotional stress, illness, or nutritional deficiencies. These constrictions can make the hair more prone to breakage and are sometimes used as indicators of past physiological stress in trichological examinations.

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      community Track hairline of Pelage executives

      in Research/Science  38 upvotes 8 months ago
      Pelage executives' hairlines were discussed, with speculation about them using PP405 for hair regrowth. Concerns were raised about using untested drugs, with some suggesting executives might not risk using them without safety data.

      community Welp - pp405 conference showed nothing

      in Update  77 upvotes 2 months ago
      PP405 shows potential for hair growth by increasing terminal hair and converting vellus hairs, but results are modest and more waiting is needed. It complements existing treatments like minoxidil and finasteride, but won't replace them.
      PP405 Identity Research

      community PP405 Identity Research

      in Research  292 upvotes 10 months ago
      PP405 is a potential hair loss treatment that inhibits mitochondrial pyruvate carriers, increasing lactate dehydrogenase activity and stimulating hair follicle stem cells. In a phase 1 trial, 31% of participants showed over 20% hair density increase with PP405 treatment.