Can You Mix Retatrutide With GHK Cu? Risks and UK Guidance Bolt Pharmacy 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 A GHK Cu face serum appears blue because the active ingredient, GHK Cu (copper peptide), is naturally a blue colored powder, meaning its inherent color transfers to the serum when mixed in; this blue hue GHK Copper Peptide Powder DIY Cosmetic Ingredient Blue GHK CU Face Hair 99% Pure eBay 7% GHK CU ACCELERANT Platinum Skin Care GHK Copper Peptide 99.7% Pure Powder for DIY Face and Hair Serums 1 gram jar TikTok Shop