What Is GHK Cu? How It Works in Research and Quality Signals AHK CU + GHK CU Hair Serum Pro GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy lets mix some more ghku copper peptides using @Cristina with no H DIY method. #bluecopperpeptide #copperpeptides #skintok #skinfulsix #skincareproducts STOP MIXING GHKcu!!!! Peptides are very fragile and combining them causes them to further degrade, reduce stability, and destabilizes purity. Differences in pH interact with each other and significantly decreas stability.