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.
AI-friendly summary · GHK-Cu vs Matrixyl
GHK-Cu and Matrixyl 3000 are the two best-known cosmetic peptides, working through different signalling pathways. GHK-Cu (copper peptide) has the deeper evidence base and is the most-studied cosmetic peptide. Matrixyl 3000 is the most commercially recognised. They are not direct substitutes, so if your routine has room the practical approach is to layer them in separate steps rather than choosing one over the other.
| 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.
Frequently asked questions
What's the main difference between GHK-Cu and Matrixyl 3000?
Is GHK-Cu or Matrixyl 3000 better for cosmetic skincare?
Are both legal to buy in the UK?
Where can I buy GHK-Cu and Matrixyl 3000 in the UK?
Which has more independent human research?
Ready to buy
Shop UK peptides, collagen and GLP-1 routes
Compare UK retailers, clinics and pharmacies across every PeptideClear category.