GHK cu is a copper peptide. It's great for skin, especially when you combine it with other things. My favorite is DMSO and derma rolling. My first experience with copper peptides was Procytes GHK: A comprehensive researcher's handbook Tydes THE SURPRISINGLY EFFECTIVE DMSO + COPPER PEPTIDE CREAM! http: store.reverseskinaging.com 3_3_GHK_Cu_Body_Soothing_Cream_p 65.htm What Makes This Product Different: Soothe tired, lax skin on the body with this product that is the first of its kind! Dr. GHK CU Crepey Skin Escape GHK Cu 200MG (Topical) Raw Amino Amazon.com : Amino Innovations Peptide Hair Serum for Hair Growth Thicker, Fuller, and Stronger with Copper Tripeptide 1, Zinc Thymulin & PTD DBM DMSO Enhanced Formula for Scalp Health and Resilience :