GHK Cu is not just a blue serum ingredient. It is a human copper binding tripeptide that keeps showing up in serious skin, matrix and wound healing research. Here is what studies keep reporting: increased Thermodynamically stable ionic liquid microemulsions pioneer pathways for topical delivery and peptide application ScienceDirect 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 GHK Cu (50mg) Alpha BioMed GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B