Have you tried pinning in upper buttcheeks? I got a bit of redness around the injection site only when I pinned GHK-Cu in the stomach area, but none in the butt. I have already gone thru like 60mgs.I just ordered some KPV. Mostly because I continue to get red irritated places around injection site of GHK cu, no matter now much I dilute it. Also am going to start MOTS c in about 10 days from now and Keep hearing people say they get worse injection site issues than with GHK cu. I'm only doing 2mg GHK cu and it doesn't sting or burn or anything mow, just makes a red itchy spot for a couple of days.
I get a bit of stinging each time, regardless of the injection site, but it's always the least stingy in the butt (and what's funny, much less in the left one than the right one, lol!)