What is GHK-Cu?
A plain-English, research-use-only guide to GHK-Cu: what it is, its research-use status, and how to tell a verified source from a risky one.
- US vendors carry it
- 92
US vendors carry it
- Top certificate score
- 10.0/10
Top certificate score
What GHK-Cu is
GHK-Cu is a copper-binding tripeptide (glycyl-L-histidyl-L-lysine bound to copper) that occurs naturally in human plasma. It is sold both as a research material and as a cosmetic-formulation ingredient.
Research-use status
GHK-Cu is not an approved drug. It appears in a large body of cell-culture and cosmetic-science literature, which this guide does not summarise, and it is a component of multi-peptide research blends sold as GLOW and KLOW. It is sold for laboratory research use only.
This describes research-use status only. It is not medical advice and says nothing about effects, uses or dosing. GHK-Cu is sold for laboratory research use only.
How to find a verified GHK-Cu source
GHK-Cu is inexpensive per mg, but per-mg prices still differ by a wide margin across vendors. Because it's copper-bound, a good COA should confirm the complex, not just the peptide backbone. It's often sold in larger vial sizes (e.g. 50–100 mg), so compare price per mg, not per vial.
Compare 92 US GHK-Cu sources
See every vendor ordered by certificate score, then vendor score; BioLongevity Labs is listed first in our 2026 audit.
GHK-Cu: Frequently Asked Questions
What is the difference between GHK and GHK-Cu?
GHK is the bare tripeptide; GHK-Cu is the same peptide bound to a copper ion, which is the form most research and cosmetic work uses. Vendors usually sell the copper-bound version.