If you're playing with raw GHK Cu, here's the secret that makes it actually work on your skin: mix it with hyaluronic acid. Not microneedling, not fancy devices just a clean Copper Peptide Solution, 1% GHK Cu in double Hyaluronic Acid Serum GHK Copper Peptide GHK Cu Tripeptide 1 Skin Perfection GHK Cu Copper Peptide Serum Booster, 1 Percent Blue Liquid For Face, Neck, Body, Hair, And Scalp, 0.5 oz Walmart.com GHK CU Topical Serum 30ml Azur Skin Can I use Cosrx Hyaluronic Acid for Mixing my GHK CU topical : r Peptidesource