Peptides like this rarely deliver quick miracles because bodies vary so much in how they respond. GLP-1s feel instant yet still work by slowly fixing biochemistry, and GHK-Cu seems to need even more time. I have run a similar mix containing it for nearly two years with only short breaks and the differences became clear only after that long stretch, especially when paired with other skin and hair habits.
I waited to finish two full rounds of injectable GHK-cu before judging it. The first was six weeks at two milligrams daily, then four weeks off, followed by eight weeks at the same dose. Skin thickness got better, roughly cutting my paper-thin look in half, and I saw small gains in fine lines, wrinkles, tone, and complexion. No one else commented though, so the changes stayed pretty mild overall. It was cheap enough to try but I expected stronger effects.