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A 2023 safety trial (n=200) confirmed no hepatotoxicity or allergy beyond 1% (Babu et al., 2023)

Because GHK-Cu seems to talk directly to fibroblasts, and because the body stocks less of it with age, fibroblasts are an obvious candidate for studying how this peptide might affect aging tissue

Mice treated with GHK showed little learning impairment after sleep deprivation in line with saline-treated mice that were not sleep deprived, and significantly less than sleep-deprived mice treated with saline (Figure 1)

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Formulation and Delivery GHK-Cu appears to pass the skin's horny layer (stratum corneum) in quantities sufficient to activate regenerative events