GHK Cu 200mg Peptides World The GHK Cu Peptide: Benefits, Uses, and Why it's Known as the Regenerative Copper Complex GHK Cu is a naturally occurring tripeptide in human plasma. Levels average 200 ng ml at age 20 and drop to 80 ng ml by age 60 (Pickart et al., 2020). That decline tracks with Copper Peptide 50mg 9 months of consistency with a protocol that works systemically, not superficially. This has included GHK Cu subcutaneous and topical, collagen, protein and an intentional lifestyle ticking off the essentials of sleep, training, Sublingual GHK Cu TruHealth Physical Therapy