GHK Cu peptide serum Northern Biolabs The research on GHK Cu goes back over 40 years a scientist dedicated his entire career to it. Your body already makes it. You just make about 60% less of it by Rapamycin & GHK Cu Cream LeadWest Medical 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