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    Did you mean Hair cuticle?
    GlossaryCuticle

    outermost layer of a hair strand, protecting inner layers

    The cuticle is the outermost layer of a hair strand, composed of overlapping, scale-like cells that protect the inner layers of the hair shaft. It acts as a barrier against environmental damage and helps maintain the hair's moisture balance, contributing to its overall strength and shine.

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      learn Adenosine

      nucleoside used for hair regrowth stimulant properties

      learn Valproic acid

      an anticonvulsant repurposed for hair loss via histone inhibition

      learn Follistatin

      glycoprotein that inhibits TGF-β and promotes hair growth by antagonizing activin

      learn GHK-Cu

      a copper peptide showing promise in both regrowth and reversing gray hair

      learn HMI-115

      much-hyped research compound targeting prolactin receptor in scalp

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      community Can microneedling damage existing hair?

      in Microneedling  9 upvotes 1 month ago
      Microneedling is unlikely to damage existing hair if done with a device using a smaller needle count, like a 9-needle cartridge, and a stamping motion. Hair follicles are deeper than the typical needle penetration depth.

      community Hair transplant result, hair+confidence back 👍

      in Progress Pictures  295 upvotes 3 years ago
      A user who got a hair transplant and gave their experience with it, including how the donor area recovered quickly and the potential risks of getting a hair transplant at a young age. Other users discussed bleaching and dyeing transplanted hair, as well as asking about the clinic where the procedure was done.

      community Caffeine in hair care – does it really help?

      in Research/Science  10 upvotes 1 week ago
      Caffeine in hair care can support hair growth but is not a standalone solution; it's best used in combination with other treatments like minoxidil and finasteride. Some products combine caffeine with these treatments for enhanced effects.