GHK CU (50mg) Nordsci GHK has been studied since 1973. Most labs still ship it without copper. Our COA shows the Cu(II) binding signature. 99%+ HPLC, copper complex verified, full COA per batch. 99%+ HPLC. Independent COA COA List PekCura Labs GHK Cu 50mg Copper Peptide Research Grade Midwest Peptide
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