Absolute GHK cu Stem Cells & Peptide Hair Growth Serum and Shampoo MTS Mall of California Absolute GHK cu Stem Cells & Peptide Hair Growth Serum and Shampoo MTS Mall of California Copper peptides (GHK Cu) have been studied for decades for their role in tissue repair and that same biology applies to hair. Research shows GHK Cu may help strengthen existing hair follicles, reduce GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline Copper Peptide Hair Growth Serum for Hair Loss & Thinning Hair Feline Skinscience