Skinworks 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 Hair Growth Serum Intense with Copper Peptide GHK Cu Mayraki Absolute GHK cu Stem Cells & Peptide Hair Growth Serum and Shampoo MTS Mall of California GHK Cu Hair Growth Copper Peptide Hair Growth Serum AHK Cu & GHK Cu + Licorice Peptide Labz GHK CU (Scalp Drops) Regen Doctors