Hello Community, I am currently taking GHK-Cu and I do not experience the sting or the burning sensation that is reported by most as a side effect. However, I do experience redness and slight swelling at the injection site. This is quite annoying because it takes days for the redness to go away and then I’m left with a hyperpigmentation mark. I’m sure it will eventually go away over time but this has discouraged me from continuing this peptide in particular. Any help and advice would be greatly appreciated on how to mitigate this reaction.