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There is also a patent (US20020183255A1) specifically covering the use of KPV for dermatological disorders, including eczematous dermatitis

Analytical Identity Copper Tripeptide-1 (GHK-Cu, CAS 89030-95-5) is a naturally occurring copper-binding tripeptide - glycyl-L-histidyl-L-lysine chelated to a divalent copper ion (Cu2+) - first identified in human plasma, where its concentration has been reported to decline with age, and later characterized in saliva and other biological fluids

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Labeled "for research use only, not for human consumption." No FDA oversight on manufacturing