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Description
A clinical trial showed that using GHK-Cu on the skin every day for three months led to an average 28% increase in collagen, which makes up 70% of our skin

21 Bnfi B, Malgrange B, Knisz J, Steger K, Dubois-Dauphin M, Krause KH

Cancer Epidemiol Biomarkers Prev 27(10):12141222

Waring WS

In a separate study, Brivio et al

Molecules, 22 , 933
