Copper peptides explained what are the differences between copper peptides and GHK CU peptides? What they actually do for the skin in terms of repair and collagen, and what you can and cant mix Skin Perfection GHK Cu Copper Peptide Serum Booster, 1 Percent Blue Liquid For Face, Neck, Body, Hair, And Scalp, 0.5 oz Walmart.com Copper peptides support skin repair, barrier recovery, and firmness signalling. But GHKCu is different not all copper peptides behave the same. A new 3% GHK Cu option from MySeries makes Amazon.com: Caffeine 5% + Bakuchiol Eye Serum for Dark Circles, Puffiness Eyes with Argireline & Copper Peptides (GHK Cu) Roll on Under Eye Serum, Anti Aging Wrinkle Care for Fine Lines 20ml : Beauty