GHK Cu Hair Growth GHK Cu peptides are used to potentially promote hair growth, increase hair follicle size, and improve scalp health, often for conditions like androgenetic alopecia. As a regenerative peptide, GHK Cu is believed to Before and after begins with consistency. Our 10% GHK Cu formula is engineered for deep absorption to support scalp health and visible density. Hair Growth Serum Intense with Copper Peptide GHK Cu Mayraki 2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care