How Long Does GHK Cu Take to Work? GHK Cu Timeline GHK Cu peptide is the ultimate tool of biohacking your skin. Injectable GHK Cu peptide works as a repair signal inside your skin. And when the skin functions better, the visible effects follow: Reduced Most people think GHK Cu is just a beauty peptide. But look at this Same person. Same lighting. Real skin change. GHK Cu works by activating repair genes in the body helping with Okay, real talk. This is my 1month progress on GHKCuno filter, no magic, just consistent repair work. , GHKCu is a naturally occurring copper pptide in our bodies that helps support collagen,