GHK CU Apollo Peptide Sciences Are Peptides the Secret to Fuller Hair? GHK CU Copper Peptide, Face Serum, 1 oz (30 ml) GHK Cu, the copper peptide, is a game changing injectable for radiant skin and so much more, , , Heres what it can do:, Boost collagen for smoother, firmer skin, Anti aging improves fine Copper Peptide Hair Growth Serum (10% GHK Cu + 5% AHK Cu) 30ml ROBYN'S TACK ROOM