Injectable Peptides for Anti Aging? A Dermatologist Explains GHK Cu BPC 157, TB 500, KPV, GHK Cu 80mg (Klow Blend) Peptide Sciences GHK Cu is more than a skincare trend its a copper peptide involved in repair, regeneration, and cellular signaling., This peptide has been studied for its connection to collagen production, skin GHK Cu is a naturally occurring copper binding peptide that plays a major role in tissue repair and remodeling, with a strong focus in research on skin and hair biology. It works by signaling