Been running GHK-Cu out of a 10mg vial, landing around 2mg a day, for roughly a month now. To make things easier I draw the dose and then fill up the rest of the syringe with bac water, going into my glute muscles every time. There are occasional lumps but the soreness has mostly disappeared, which I'm happy about. Feels like my system's getting used to the copper as time goes on. Tough to point to specific results just yet, mainly chasing better hair and skin, and I've still got twenty of the 10mg vials to burn through, roughly at the midpoint now. As for my overall take, I'm a fan, and yes, I'd purchase it again based purely on how my body seems to respond, feels beneficial and I'm sticking with the daily routine. Compounds like this strike me as subtler than something like growth hormone or the third compound, though subtle doesn't mean nothing's happening under the surface. Would recommend giving it a shot.