Hilda Gonzalez Larkin Community Hospital LinkedIn 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 Regenerative aesthetics for forehead rejuvenation This before and after highlights smoother, more even looking skin through regenerative treatment focused on collagen stimulation and improving skin quality in the forehead area. This is Peptide GHK CU Cream Concierge MD