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Absorption and Penetration The structural variation between GHK-Cu and AHK-Cu affects their absorption and penetration properties

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GHK-Cu (Glycyl-L-Histidyl-L-Lysine-Copper) is a naturally occurring tripeptide-copper complex first isolated from human plasma in 1973

doi: 10.1186/s13148-023-01469-x 112 AnwayMDLeathersCSkinnerMK