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 The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline 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: Injectable Peptides for Anti Aging? A Dermatologist Explains GHK Cu