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GHK-Cu is a complex formed by the GHK tripeptide and a divalent copper ion (Cu)
Nitration can alter that region enough to weaken or prevent the connection
Most injectable demand is tied to skin-whitening claims, which is what triggered regulatory warnings in several countries
Respir Res
By Meet Earths Newest Monkey
PF-06743649 phase I clinical trials have been completed (Yue et al., 2019)
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