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 gray hair CARINA GINZA Nurturing Your Locks: Mastering the Hair Growth Cycle Clinikally Before and after begins with consistency. Our 10% GHK Cu formula is engineered for deep absorption to support scalp health and visible density. Hair follows a specific growth cycle with three distinct and concurrent phases anagen, catagen, and telogen phases. Each phase has specific characteristics that determine the length of the hair Stock Photo Hair Growth Cycle: The Circular Life & Death of Follicles