GHK Copper Peptide 99.7% Pure Powder for DIY Face and Hair Serums 1 gram jar TikTok Shop If youre playing with raw GHK Cu, heres the secret that makes it actually work on your skin: mix it with hyaluronic acid. , Not microneedling, not fancy devices just a clean HA serum as the 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 superPeptide 1% GHK Copper Peptide Serum Pure & Cimple Buy GHK Cu Peptide 99%+ Purity GHK Cu for Research