Matrixyl (Palmitoyl Pentapeptide-4)
One of the most widely used cosmetic peptides — a signal peptide that stimulates fibroblasts to produce more collagen, elastin, and hyaluronic acid.
Overview
Matrixyl, technically Palmitoyl Pentapeptide-4 (originally Pal-KTTKS), is a synthetic signal peptide attached to a palmitic acid chain for skin penetration. It mimics a fragment of pro-collagen I and signals fibroblasts to produce more extracellular matrix. It's one of the most widely used cosmetic peptides — appearing in countless skincare products from drugstore to luxury tier.
Benefits
- Stimulates collagen and elastin synthesis
- May reduce wrinkle depth and volume in studies
- Supports skin firmness and texture
- Well-tolerated topically
Mechanism of Action
The pentapeptide sequence (KTTKS) mimics a fragment of pro-collagen I, signaling fibroblasts to upregulate extracellular matrix production. The palmitic acid chain enables skin penetration.
Dosage (informational only)
- Typical range
- 2–8% concentration in topical formulations
- Frequency
- Daily topical application
Visible improvements typically appear after 4–8 weeks of consistent use.
Side Effects
- Generally well-tolerated
- Possible mild irritation in sensitive skin
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