What are the guidelines for using GHK Cu (Glycyl Histidyl Lysine Copper) peptide in patients with underlying health conditions for wound healing and cosmetic applications? GHK Cu LVLUP Health Peptides seem to be everywhere right now. We've been looking into a few, like copper peptides, BPC 157, and TB500, mostly from a recovery and skin support standpoint. Still learning, still observing, and 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