Bellahut COPPER (GHK Cu) With Copper Tripeptide 1 (1% Solution ) Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with 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. Pptido de cobre GHK GHK Cu Tripptido 1