Head to head
Matrixyl against GHK-Cu
Two topical peptides with genuine human skin data and different mechanisms, collagen signalling against copper delivery and remodelling. This is one of the few cosmetic pairs where both sides have something to show.
Column A
MatrixylPalmitoyl Pentapeptide-4 (Matrixyl)
A widely used topical skincare peptide that signals the skin to produce more collagen, studied for fine lines and firmness.
Column B
GHK-CuCopper Tripeptide-1 (GHK-Cu)
A naturally occurring copper-binding tripeptide widely used in skincare and studied for wound healing and skin remodeling.
Side by side, on the facts we can check
| Attribute | Matrixyl | GHK-Cu |
|---|---|---|
| Category | Cosmetic | Healing & Recovery |
| FDA status | Cosmetic ingredient; not an approved drug | Not an approved drug; permitted as a cosmetic ingredient |
| Half-life | Topical (penetrates surface) | Short (topical use) |
| Molecular weight | 802.0 Da | 340.38 Da (free peptide); 402.92 Da (the copper complex, PubChem CID 71587328) |
| Mechanism | Signals dermal fibroblasts to increase collagen and matrix production, supporting skin structure. | Delivers copper and modulates genes involved in tissue remodeling, stimulating collagen and glycosaminoglycan synthesis and supporting wound repair. |
| Human studies cited | 1 | 0 |
| Legal status, US | Permitted as a cosmetic ingredient; not a drug | Permitted in cosmetics; not an approved drug |
Frequently asked questions
What is the difference between Matrixyl and GHK-Cu?
Matrixyl: A widely used topical skincare peptide that signals the skin to produce more collagen, studied for fine lines and firmness. GHK-Cu: A naturally occurring copper-binding tripeptide widely used in skincare and studied for wound healing and skin remodeling.
Which has stronger research evidence, Matrixyl or GHK-Cu?
This database does not grade compounds. It counts what was run in people: 1 of the 2 studies cited on the Matrixyl profile were human work, against 0 of 3 for GHK-Cu. Those counts are of our own citation lists and understate any larger literature, and neither is a recommendation.
Are Matrixyl and GHK-Cu FDA-approved?
Matrixyl: Cosmetic ingredient; not an approved drug. GHK-Cu: Not an approved drug; permitted as a cosmetic ingredient.
Related posts
Blog articles that cover Matrixyl or GHK-Cu, newest first.
- Longevity / Sep 8, 2026 / 12 minPeptides for Longevity: What the Evidence Actually Shows in 2026
- Healing & Recovery / Sep 8, 2026 / 9 minPeptides for Joint Pain: BPC-157, TB-500, Lorecivivint, Pentosan and Collagen Peptides, Evidence Tiered
- Research / Sep 8, 2026 / 9 minPeptides for Hair Growth: GHK-Cu, PTD-DBM and the PP405 Phase 2a Results
- Safety / Sep 8, 2026 / 9 minPeptide Side Effects by Class: What Is Documented, What Is Anecdotal
Reviewed Sep 2026. This page sets two published records side by side. It is educational, it is not medical advice, and it contains no dosing protocols or recommendations for personal use.