Quick summary
Matrixyl (Palmitoyl Pentapeptide-4) is a collagen-stimulating signal peptide used in topical anti-aging skincare. It acts as a matrikine fragment that triggers fibroblasts to produce new collagen, elastin, and glycosaminoglycans, and is one of the most widely commercialized cosmetic peptides.
Overview
Matrixyl (Palmitoyl Pentapeptide-4) is a cosmetic signal peptide consisting of five amino acids (Lys-Thr-Thr-Lys-Ser) conjugated to a palmitoyl chain for enhanced skin penetration. It was among the first widely commercialized anti-aging peptides and acts as a matrikine — a fragment of extracellular matrix proteins that signals fibroblasts to produce new collagen, elastin, and glycosaminoglycans.
Mechanism of action
Palmitoyl Pentapeptide-4 is a fragment of type I procollagen that acts on fibroblasts via a matrikine signaling pathway. The peptide sequence KTTKS is recognized by fibroblast surface receptors, triggering intracellular cascades that upregulate synthesis of collagen types I, III, and IV, fibronectin, and glycosaminoglycans. The palmitoyl chain increases lipophilicity, facilitating transdermal delivery across the stratum corneum into the dermis where fibroblasts reside. It also reduces collagenase (MMP) activity, slowing extracellular matrix degradation.
Dosing protocols
| Purpose | Route | Dosage | Frequency | Notes |
|---|---|---|---|---|
| collagen stimulation and anti-aging | topical | 3–8 % | twice daily | Effective at 10–100 ppm pure peptide in finished formulation. Apply to face and neck morning and evening. Effects typically observed after 8–12 weeks. |
Dosing information is for educational purposes only. Consult a qualified healthcare professional before using any peptide.
Research summary
In vitro studies demonstrate dose-dependent upregulation of collagen I, III, and IV in human dermal fibroblasts at concentrations of 10–100 ppm. A clinical study found significant improvement in skin texture, smoothness, and wrinkle depth after 12 weeks of twice-daily application. Matrixyl is included in Matrixyl 3000 formulations combined with Palmitoyl Tripeptide-1, and this combination has shown additive collagen-stimulating effects. The CIR has assessed palmitoyl pentapeptide-4 as safe for cosmetic use.[1][2][3][4][5]
Evidence grading
Each claimed benefit is graded by the strength of available evidence. Grades reflect study quality, not effect size.
Strong = multiple RCTs · Moderate = limited trials or observational · Preliminary = animal or in vitro only · Insufficient = anecdotal or no published data
Side effects
Side effects vary by individual. This is not an exhaustive list. Report unusual symptoms to a healthcare professional.
Common stacks
Peptides commonly paired with Matrixyl for synergistic effects.
Legal status
Permitted cosmetic ingredient globally. No drug scheduling or prescription requirements. Sold in OTC anti-aging formulations and as a raw ingredient for formulators. No regulatory restrictions on use concentration in most markets.
Sourcing & access
Research compound
Matrixyl is classified as a research compound. Regulatory status varies by jurisdiction. Always verify current legal status and source from vendors providing third-party certificates of analysis (COA).
Frequently asked questions
Matrixyl (Palmitoyl Pentapeptide-4) is a five-amino acid cosmetic peptide conjugated to a palmitoyl chain for skin penetration. It is a matrikine, meaning it is a fragment of the extracellular matrix that signals fibroblasts to produce new collagen types I, III, and IV.
The KTTKS peptide sequence is recognized by fibroblast surface receptors, triggering intracellular cascades that upregulate collagen, fibronectin, and glycosaminoglycan synthesis. The palmitoyl chain increases lipophilicity for delivery through the stratum corneum to dermal fibroblasts.
Matrixyl 3000 is a commercial anti-aging ingredient system combining Palmitoyl Pentapeptide-4 with Palmitoyl Tripeptide-1, which provides additive collagen-stimulating effects. The combination simultaneously targets structural matrix rebuilding via collagen I, III, and IV upregulation and the inflammatory pathways involved in skin aging, making it one of the most widely used multi-peptide anti-aging formulations in commercial skincare.
Clinical studies show significant improvement in skin texture, smoothness, and wrinkle depth after 8 to 12 weeks of twice-daily application. It is effective at concentrations of 10 to 100 ppm pure peptide in the finished formulation.
The Cosmetic Ingredient Review has assessed Palmitoyl Pentapeptide-4 as safe for cosmetic use. It is generally very well tolerated with no known systemic effects at cosmetic concentrations. Mild sensitivity occurs in rare cases.
Research references
- Topical palmitoyl pentapeptide provides improvement in photoaged human facial skinPubMed
- Topically applied KTTKS: a reviewPubMed
- Dermal Stability and In Vitro Skin Permeation of Collagen Pentapeptides (KTTKS and palmitoyl-KTTKS)PubMed
- Matrixyl Patch vs Matrixyl Cream: A Comparative In Vivo Investigation of Matrixyl (MTI) Effect on Wound HealingPubMed
- Peptides: Emerging Candidates for the Prevention and Treatment of Skin Senescence: A ReviewPubMed