@SkepticJen I mixed Ghk-cu 100mg+KPV20mg w/ 15 ml bac.

For me, the only thing that keeps the stinging at bay is using it with KPV. Some people draw up the KPV and the ghk into the same syringe and pin one time. I was pinning them separately for a while, but after doing some research I decided to mix them both in one vial. I pinned that last night and didn't get any sting.