About Palmitoyl Pentapeptide-4
Binds TGF-β receptors on fibroblasts, upregulating collagen I, III, fibronectin, and hyaluronic acid synthesis. The palmitoyl chain provides lipophilicity for improved skin penetration into the dermis.
Palmitoyl pentapeptide-4 (Pal-KTTKS; Pal-Lys-Thr-Thr-Lys-Ser; marketed as Matrixyl) is a fatty acid-conjugated synthetic pentapeptide derived from the pro-collagen I sequence, conjugated with palmitic acid to enhance dermal penetration, and developed as a cosmetic active ingredient to stimulate skin matrix protein synthesis through matrikine-based signaling that mimics the natural tissue repair response to collagen degradation. The palmitoyl conjugation facilitates absorption through the stratum corneum; within the dermis, the KTTKS matrikine sequence is proposed to activate fibroblast biosynthesis of collagen I, collagen IV, fibronectin, and hyaluronic acid, replenishing structural proteins that decline with photoaging and chronological aging without requiring receptor agonism or systemic hormonal activity. A published human clinical study in photoaged facial skin using split-face profilometry measurement reported reductions in fine line depth and surface roughness following topical application, providing the primary indexed human evidence for anti-aging activity; the research was industry-affiliated and effect sizes were modest by pharmaceutical standards. Palmitoyl pentapeptide-4 is a cosmetic ingredient with no FDA drug approval; it requires no prescription and is widely incorporated into commercial anti-aging serums and moisturizers; the evidence base is limited to a single industry-affiliated human study, and the compound should be understood as a cosmetically active ingredient rather than a clinically validated therapeutic.
Palmitoyl Pentapeptide-4 Benefits & Research Areas
Regulatory & Evidence
Risk Profile
Generally considered lower risk in research contexts. Risk profile varies by individual — review contraindications before use.
Regulatory Status
- Availability Status
- Research Only
Regulatory status reflects publicly available information and may change. This is not legal or medical advice.
Research Sources
1 source cited · 1 strong
1 RCT
Topical palmitoyl pentapeptide provides improvement in photoaged human facial skin
International Journal of Cosmetic Science · 2005
In a 12-week double-blind, placebo-controlled, split-face randomized controlled trial of 93 women, topical palmitoyl pentapeptide-4 (Pal-KTTKS) at 3 ppm significantly reduced wrinkles and fine lines versus placebo by quantitative technical image analysis and expert grader assessment, validating its use as a topical collagen-stimulating anti-aging signal peptide.
Palmitoyl Pentapeptide-4 Side Effects & Safety Considerations
Generally considered lower risk in research contexts. Individual response varies — review all considerations before use.
Reported contraindications & considerations
Consult a qualified healthcare professional before making any health decisions. This information is educational only and does not constitute medical advice.
Where to Buy Palmitoyl Pentapeptide-4 — Providers & Availability
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Questions to Ask Your Provider
Frequently Asked Questions — Palmitoyl Pentapeptide-4
Palmitoyl pentapeptide-4 (Pal-KTTKS; Pal-Lys-Thr-Thr-Lys-Ser; marketed as Matrixyl) is a fatty acid-conjugated synthetic pentapeptide derived from the pro-collagen I sequence, conjugated with palmitic acid to enhance dermal penetration, and developed as a cosmetic active ingredient to stimulate skin matrix protein synthesis through matrikine-based signaling that mimics the natural tissue repair response to collagen degradation. The palmitoyl conjugation facilitates absorption through the stratum corneum; within the dermis, the KTTKS matrikine sequence is proposed to activate fibroblast biosynthesis of collagen I, collagen IV, fibronectin, and hyaluronic acid, replenishing structural proteins that decline with photoaging and chronological aging without requiring receptor agonism or systemic hormonal activity.
collagen synthesis, wrinkle reduction, skin firmness, extracellular matrix support.
Research on Palmitoyl Pentapeptide-4 primarily documents effects related to collagen synthesis and wrinkle reduction and skin firmness and extracellular matrix support. These are areas covered in preclinical and clinical literature — individual response varies and effects depend on context of use.
Reported contraindications and considerations for Palmitoyl Pentapeptide-4 include pregnant or nursing. This is educational information only — consult a qualified healthcare professional before use.
2 providers in the directory currently offer Palmitoyl Pentapeptide-4.
In a 12-week double-blind, placebo-controlled, split-face randomized controlled trial of 93 women, topical palmitoyl pentapeptide-4 (Pal-KTTKS) at 3 ppm significantly reduced wrinkles and fine lines versus placebo by quantitative technical image analysis and expert grader assessment, validating its use as a topical collagen-stimulating anti-aging signal peptide.