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The Hostynek and Maibach group at UCSF measured exactly this in 2011: human skin permeation of GHK-Cu as a function of skin layer, with the result that the peptide accumulates in the upper stratum corneum but does not pass through to viable epidermis or dermis in any meaningful quantity 4
The proposed mechanism is restoration of normal melatonin production in individuals with age-related decline
[00:04:06] Josh: It helps
Front desk staff is amazing, they are always smiling when you walk in and have made me feel welcomed and like they have known me for a while
The patient interest comes mostly from athletes and recovery-focused patients
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