Appreciate that and yeah, definitely. The copper peptide doesn't sting much on me, though histamine reactions do show up. Nothing close to how rough the growth-hormone releasing peptide was though. For reference I use a larger vial mixed with a decent amount of diluent, and my abdomen specifically is where the bad reaction shows up every time. Glutes though, completely fine, honestly fantastic. Also experimented injecting into my shoulders a handful of times and that's gone really smoothly too. Nothing unpleasant at all, aside from a bit of soreness lingering an hour or two afterward.