One of the questions we often receive about our products is: Why is the GHK Cu Repairing Serum stored in two part packaging? , GHK Cu is an unstable ingredient that can slowly lose its effectiveness SumaNurica MYER Ive had @sumanurica in my routine for almost a year now, so adding the new GHK Cu Repairing Serum felt like the perfect next step , Its lightweight, calming and layers beautifully, especially on Struggling with hair thinning or shedding? Meet GHK Cu, the topical peptide everyone is talking about and NO, it's not an injection! This powerful serum helps: Reduce shedding GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy