Copper Peptide Hair Growth Serum for Hair Loss & Thinning Hair Feline Skinscience Pptido de cobre GHK GHK Cu Tripptido 1 Copper Peptide Serum for Hair Regrowth & Thinning Hair Feline Skinscience Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum GHK Cu (Copper Peptide) is a naturally occurring substance in the body made of a small protein (peptide) and copper. In simple terms, GHK Cu helps the body repair and renew itself. As we