GHK Cu Copper Peptide Scalp Therapy Copper Peptide Hair Growth Serum (GHK Cu & AHK Cu) Why GHK Cu Became the Most Talked About Peptide in Cosmetic Research Research Guide Tide Labs Tide Labs 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 OG6: A New Research Avenue for Hair Growth? Follicle Thought