GHK Cu is not Botox. It does not freeze a single muscle. It works because it works at the matrix level. GHK Cu stimulates collagen and glycosaminoglycan synthesis, modulates the matrix metalloproteinases that govern GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? GHK Cu 100 mg High Purity Copper Peptide Proliven Labs Thermodynamically stable ionic liquid microemulsions pioneer pathways for topical delivery and peptide application ScienceDirect