Breaking: more people are starting to explore copper peptides over retinol Not because retinol is bad but because people are beginning to understand how different ingredients actually work. GHK Cu is something your Acetylcysteine, N acetylcysteine, NAC drug molecule. It is an antioxidant and glutathione inducer. Skeletal chemical formula on the dark blue backgrou Stock Photo Alamy NAC N Acetyl L Cysteine NAC vs Glutathione: Comparing Antioxidant Powerhouses for Your Health IVDrips GHK Cu Ascend Bio Labs N Acetyl Cysteine NAC