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GHK-Cu: Skin Benefits GHK-Cu is a copper peptide studied for its role in supporting collagen production, skin repair, and anti-oxidant activity. Research suggests it may help improve skin firmness, elasticity, and overall Sports Performance https://media.springernature.com/m685/springer-static/image/art%3A10.1007%2Fs12035-014-8705-x/MediaObjects/12035_2014_8705_Fig1_HTML.gif Moderate = one good human trial or consistent animal RCTs Size:1EA

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