GHK cu is a copper peptide. It's great for skin, especially when you combine it with other things. My favorite is DMSO and derma rolling. My first experience with copper peptides was Procytes GHK CU Crepey Skin Escape GHK Cu Ascend Bio Labs GHK Cu Copper Peptide for Research GhostLabz GHK CU 100mg VishChems
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