Cosmetic peptide head to head
GHK-Cu vs Matrixyl 3000
GHK-Cu has the deeper evidence base and is the most-studied cosmetic peptide. Matrixyl 3000 is the most commercially recognised. Both work via different signalling pathways. Layer them in separate steps rather than picking one or the other if your routine has room.
| GHK-Cu | Matrixyl 3000 | |
|---|---|---|
| Class | Single peptide bound to copper | Branded blend (palmitoyl tripeptide-1 + tetrapeptide-7) |
| Discovered / developed | Pickart, 1973 | Sederma, 2000s |
| Mechanism | Activates copper-dependent enzymes, supports collagen and elastin synthesis, calms inflammation | Triggers wound healing pathway, signals collagen and glycosaminoglycan production |
| Evidence base | Decades of in-vitro and topical human research, mostly Pickart group plus independent labs | Manufacturer-led RCTs, plus some independent topical studies |
| Effective topical concentration | 0.1 to 1% across studies | 3 to 8% of trade ingredient (~0.05 to 0.1% of named peptides) |
| Stable in | Neutral to slightly alkaline pH | Neutral pH, hydrated formulas |
| Pairs poorly with | Vitamin C in same step (low pH degrades), strong AHAs in same step | Same. Most peptides degrade in low pH |
| Pairs well with | Hyaluronic acid, niacinamide (separate steps), ceramides | Hyaluronic acid, niacinamide, peptide complexes |
| Strongest claim | Most-studied cosmetic peptide. Strongest evidence base. | Most commercially recognised. Strong marketing reach. |
Which to pick if you can only pick one
- · **Pick GHK-Cu** if you want the strongest evidence base and you trust ingredient-led skincare brands. The blue-green tint of copper-peptide serums is real (it is the copper).
- · **Pick Matrixyl 3000** if your routine is already busy and you want a peptide complex with brand recognition. The Ordinary Matrixyl 10% + HA is the price-leader UK formulation.
- · **Layer both** if your routine has room. Different mechanisms, complementary signalling.
See our individual category pages: GHK-Cu and Matrixyl 3000.
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