lets mix some more ghku copper peptides using @Cristina with no H DIY method. #bluecopperpeptide #copperpeptides #skintok #skinfulsix #skincareproducts 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 Mistakes Mixing GHK CU Peptides with Hyaluronic Acid 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