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It is not approved for human or animal use and must not be incorporated into foods, cosmetics, medications, or diagnostic applications
While generally well-tolerated, some potential side effects or risks have been observed in GHK-Cu research, particularly with higher concentrations or in subjects with sensitive skin
Common (110 in 100 people): dry or flaky patches, itching, temporary darkening of pre-existing spots as skin renews
10.1002/14651858.CD000980.pub4 Cochrane Database
It is synthesised using solid-phase peptide synthesis (SPPS) and purified through high-performance liquid chromatography (HPLC)
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