Copper Peptide Hair Growth Serum for Hair Loss & Thinning Hair Feline Skinscience Private Label Organic Professional Treatment Hair Loss Copper Peptide Hair Growth Serum10% Ghk Cu Hair Growth Serum : . Dr. Shintre breaks down what it is and why it works. ? A copper based peptide that naturally occurs in your More than hair its cellular support , GHK CU is a well studied copper peptide known for its role in supporting:, Healthier looking hair & scalp environment, Hair that appears thicker,