I started at 3mg with with the intention of ending up at 4mg, so that was my plan to gradually move up. I'm on Day 2, so take that for what it's worth, but I have no stinging sensation that others talk about with GLOW or GHK-CU. This is supposed to be due to the anti-inflammation properties of KPV.
If I had it to do over, I'd use a 5ml vial and add a total of 4ml of BAC so the units are slightly higher.
For some reason, it seems like there is more resistance than I antipicated to push with my pen. The concentration of the solution may be a little viscous for an 11unit push. Thinning it out with a little more BAC could help.