PP405 Won’t Work: Follicle Is Miniaturized, Fibrosed, And Missing Key Support Cells
    2/9/2026

    From the encyclopedia
    Minoxidil →

    Vasodilator used on the scalp and, at low doses, as a tablet

    Finasteride →

    Popular 5-alpha reductase inhibitor that lowers DHT, taken as a pill or used topically

    At a glance
    In this research discussion post, the primary subjects mentioned are the tone is 😐 neutral.

    Other terms

    PP405 is ineffective for miniaturized, fibrosed hair follicles in androgenetic alopecia. AMP303 may activate hair follicle stem cells, but minoxidil and finasteride are still the main treatments.
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      community My Theory Of Androgenic Alopecia

       16 upvotes 10 months ago
      Hair loss is linked to cellular physiology and the IGF-1 to TGF-B1 ratio, not just androgen sensitivity. The theory lacks evidence, while finasteride and minoxidil are effective treatments.

      community Blocking dht should bring it back. So why does fin mostly just hold the line?

       17 upvotes 3 months ago
      Finasteride mainly prevents further hair loss by blocking DHT but doesn't reverse existing damage, while minoxidil can promote regrowth by waking dormant follicles. Ketoconazole helps with inflammation, but none of these treatments can reverse fibrosis or structural changes around hair follicles.

      community Why does the age of hair loss matter?

       38 upvotes 4 weeks ago
      Age affects hair loss severity and treatment effectiveness, with younger individuals often experiencing more aggressive loss but potentially better regrowth due to less follicle miniaturization. Treatments like finasteride and minoxidil are commonly used, and early intervention is crucial for better outcomes.

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