Debunking the Myth That Mixing GHK Cu With Other Peptides Causes Damage Xcel Peptides lets mix some more ghku copper peptides using @Cristina with no H DIY method. #bluecopperpeptide #copperpeptides #skintok #skinfulsix #skincareproducts GHK Cu Peptide Dosing PeptidesPower 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.