I've tested more topical peptides than most dermatologists have recommended and I have strong opinions about all of them. Peptides are the communication system your skin runs on and around 40, that GHK CU for Sale Tripeptide 1 3rd Party Tested US Made GHK CU for Sale Tripeptide 1 3rd Party Tested US Made Advanced Aging Collection 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 Focus On: Copper Peptides BTY ALY