Just started GHK Cu? Heres what to expect, This isnt an overnight peptide, it builds, Weeks 12:, You may start noticing small shiftsskin feels a bit smoother, nails a little stronger, Weeks 34:, Wellness peptide craze: why people are injecting drugs 'not for human consumption' BBC News GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has GHK Cu, the copper peptide, is a game changing injectable for radiant skin and so much more, , , Heres what it can do:, Boost collagen for smoother, firmer skin, Anti aging improves fine