ghk-cu side affects Copper Peptide: The Ultimate Peptide For Longevity GHK-Cu Peptides Before and After:
Description
C.FomichevaE.Whittum-HudsonJ

doi:10.1016/j.amjoto.2020.102640
for compounded peptide therapy

After an additional three washings with PBS, positive signals were developed with an enhanced chemiluminescence kit [2]

This doesn't mean high-concentration products are dangerous or ineffective
