Five Peptides Every Endurance Athlete Should Understand What is the optimal dosing regimen of GHKCu for topical skincare and woundhealing applications? GHK Cu Hyaluronic Acid Gel Wells Pharmacy Network 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