Can You Use GHK Cu Peptides with Vitamin C Serum? Expert Guide Copper Peptides for Skin Copper Peptides for Face PLU Labs 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 Blue Me Away: Skin Biology 7% GHK Cu Accelerant Review BeautyandtheCat's Beauty Blog Not all copper peptide serums are formulated the same Before you buy one, make sure you're actually getting pure GHK Cu at the right concentration not just a diluted blend. We spent MAXXING. Coming soon., Every product we make lists the exact percentage of every active ingredient on the label., No proprietary blends. No peptide complexes hiding the dose. No fairy dust., 5%