Thermodynamically stable ionic liquid microemulsions pioneer pathways for topical delivery and peptide application ScienceDirect When a product says copper peptides it's worth checking the ingredient list. Copper peptides (like **Copper Tripeptide 1 GHK Cu**) are signaling ingredients that can support collagen processes in the skin. But not GHK Cu Copper tripeptide (1% solution) Sapolita GHK Cu Copper Tripeptide 1 Research Reagent Amazon.com: GHK Cu Copper Peptide Powder 99.7%+ Pure Cosmetic Grade Ingredient for DIY Serums, Creams & Scalp Tonics Supports Collagen & Fuller Hair (1g) : Beauty & Personal Care