A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend If your GHK injection site gets irritated try this , 1. Dilute it by adding more water to the syringe , 2. Let it sit until it reaches room temperature , Also, make sure youre rotating injection GHK Cu by LVLUP Help supportth Premium Supplement Supps247 I had an unexpected allergic reaction to beauty peptides GHK Cu, BPC 157 & TB 500 theyre popular for skin & hair, but I got a rash hours after injection , #PeptideReaction #GHKCU #BPC157 #TB500