GHK Cu Face Serum 1200MG Lab Tested & High Potency Neurogan Health GHK Copper Peptide GHK Cu Tripeptide 1 Copper peptide questions we get asked all the time , How often should you use it? Do you need to avoid the sun?, If youre new, start once daily (evenings are great), then build up if your skins Just started GHK Cu? Here's what to expect This isn't an overnight peptide, it builds Weeks 12: You may start noticing small shiftsskin feels a bit smoother, nails a little stronger Weeks 34: