Everything you need to know about GHK Cu WHAT IS IT? A copper peptide your body naturally produces but production drops by 60% by age 60. It's one of the most 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 Okay I keep getting the same questions about GHK Cu so let's just go through them. Does it raise your copper levels? The copper is bound to the peptide, not free floating in GHK Cu (50 MG) Sigma Compounds BPC 157, 10mg Core Aminos Research BPC 157 Capsules 250mcg (10 btls.) Licensed Peptides