6 clinical peptideseach designed to signal your follicles to behave younger, stronger, and more active., GHK cu Stimulates growth by increasing blood flow + collagen, PAL AHK Repairs + Cellular Glow Hair Serum 10% GHK Cu + 5% AHK Cu Peptides R 10% GHK Cu + 5% AHK CuCopper Peptide Hair Density Serum GHK Cu Copper Peptide Serum for Hair Growth Hair Thinning & Loss Copper Peptide Hair Growth Serum AHK Cu & GHK Cu + Licorice Peptide Labz