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 99.7% Pure Powder for DIY Face and Hair Serums 1 gram jar TikTok Shop China Good Quality Copper Peptide Ghk Cu Cosmetic Anti Wincle Ghk Cu Copper Peptide Powder Ghk Cu factory and manufacturers Unilong 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 GHK Cu for Sale Stanford Advanced Materials