Ghk cu Peptide Face Serum NEW Cobalt Blue Bottle 2 Oz Etsy Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with Copper Peptide GHK CU 12% Serum for Face Anti Wrinkle Increase Collagen 1oz 30ml Anti Aging for Skin One of my patients has shared this picture with me as she felt it was odd that this peptide had this very vivid blue colour, while her other peptides had a clear