Hi : ) CAIS is NIOD's Copper Amino Isolate Serum. It contains GHK peptides bound to copper which is known as copper peptides (GHK Cu) that are found in our plasma and are good GHK CU 50mg Vial Copper Peptide Pure Bio Labs These are the five copper peptide treatments currently on rotation: NIOD CAIS: watery, lightweight, and still the most effective option on our list. There is something so deeply hydrating and reparative about GHK CU Beverly Hills Rejuvenation Center