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Cutaneous wound healing: GHK-Cu has decades of dermatologic literature documenting accelerated re-epithelialization, reduced scarring, and improved tensile strength of healed skin (Pickart et al., 2015)
However, if you want to know what to avoid when taking glutatione besides this, here is a list of things that may be a problem, 1

It does not alter insulin sensitivity

Our findings could have implications beyond HIV and need further investigation, Sekhar said