how to store ghk-cu GHK CU COPPER 50mg – My GHK-Cu Stability: Research Storage Guide
Description
When vendors offer products at 50% below competitors, they typically cut corners on purity verification, use lower-grade synthesis methods, or ship degraded product that has been improperly stored

It would then stop and go all day

At 0.5%, you're still delivering concentrations far exceeding the nanomolar levels shown effective in research

[PubMed] pubmed.ncbi.nlm.nih.gov DeLoughery TG
