The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds, Your body made this peptide every day until you turned 30. Then it stopped. GHK Cu (copper peptide) is a naturally occurring tripeptide discovered in 1973. At age 20, your plasma levels sit Products Tagged "GHK Cu peptide" Supplements.co.nz Thoughts on this product? 1 mg sublingual minoxidil + 1 mg Ghk Cu : r HairlossResearch