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 GHK Cu Blue Copper Peptide Serum GHK Cu Blue Copper Peptide Serum GHK Cu Injectable Team Wellcore Copper Peptides GHK Cu Beef Tallow for Skin: Blue Balm with Methylene Blue, Manuka Honey & Vitamin E Natural Face and Body Moisturizer for Mature, Dry & Sensitive Skin 2oz