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.
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.
Where to get it
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