GHK CU 50mg Vial Copper Peptide Pure Bio Labs People are searching for the GHK Cu pen. Ordering it online. Trying to figure out how to use it safely at home. We looked at all of that and thought: there has to 7 days on GHK Cu. Here's my honest update. I'm not going to hype this up because the real results don't even start until week 46. But something is already happening. Buy GHK Cu 100mg Online (Copper Peptide) 99% Purity