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AHK Cu Copper Peptide Hair Growth Study (2007) Plain Language Summary Hairgenetix GHK Cu Peptide for Hair Growth: Science, Benefits, and How It Works GHK Peptide Hair Growth Clinical Trial (2016) Research Summary Hairgenetix GHK Cu for hair growth does it actually work? Short answer: no. GHK Cu can be great for skin but when it comes to hair growth, the evidence just isn't there. And this
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