ghk cu topical vs injected Unfortunately, GHK-Cu can sting, irritate and leave lumps or a small rash at the injection site. This happens because GHK-Cu (Copper Tripeptide-1) is a small, positively charged molecule that can cause temporary L-Glutathione (Reduced), 500 mg, Size:Men's 16 Wide / Women's 18 Wide Fast Glow Mask
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