Peptide data sheet
GHK-Cu
Skincare · Copper tripeptide-1 · GHK-copper
Verdict
promisingtopical only
Quick answer
GHK-Cu is a naturally occurring copper-binding tripeptide most people know from skincare. Topically, it has been studied in small human cosmetic trials for firmness and fine lines, which is why the topical form sits at Promising. The injectable, research-grade form has no human efficacy data, so it stays Unproven. It is not FDA-approved and is not a retinoid replacement.
- Class
- Copper-binding tripeptide (GHK complexed with copper)
- Half-life
- Not established
- FDA status
- Cosmetic ingredient (topical); research use only for other forms; not an approved drug
- WADA banned?
- No
Which form actually works?
Topical (serum / cream)
Promising
The form with actual human cosmetic data behind it. Small trials have looked at skin firmness, fine lines, and how the skin barrier behaves. Legal, sold over the counter, and the reason GHK-Cu has a reputation at all. Framed honestly, it is a support ingredient people report layering in, not a miracle in a bottle.
Injectable (research vial)
Unproven
No human efficacy data, gray-market sourcing, and real copper-accumulation concerns. This is the form the hype outruns the evidence on. Sold for research use only, not for human use, and not something the cosmetic studies say anything about.