also would anyone know - if my ghkcu went cloudy, and i removed those cloudy bits using an insulin needle, will the relatively clear remaining bits be fine to pin or should i just discard and recon a new vial?
Yip, had the same issue with CJC/IPA, doing 1:1 WFI and BAC works, but recon with WFI first.
I currently just recon with WFI and don't bother with BAC.
4 weeks is fine a long as you are working in a sterile manner, but I would not go beyond 4 weeks.
I have not tried GHK-CU, I have 100mg vials I'll be reconstituting next week, so will test then