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GHK-Cu activates lysyl oxidase and prolyl hydroxylase enzymes, important for cross-linking collagen fibers and maintaining skin structure (Pickart, Biochemical Pharmacology, 2008)
Take erectile dysfunction (ED), for example
Skin Rejuvenation In the 12-week comparative trial, 70% of women showed increased collagen with GHK-Cu versus 50% with vitamin C versus 40% with retinoic acid (Pickart et al., 2015)
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