All About GHK Cu Peptide More Than Just Cosmetic PSA] Finally, a Dr. explains the mechanism behind the "copper uglies" : r SkincareAddiction GHK Cu Peptide Side Effects Safety, Treatments Neurogan Health 7 days on GHK Cu. Here's my honest update. I'm not going to hype this up because the real results don't even start until week 46. But something is already happening. GHK Cu: A Comprehensive Guide to Benefits, Side Effects, and Dosages First Compounding Pharmacy 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK