Palmitoyl Pentapeptide-4
Palmitoyl Pentapeptide-4
Also known as: Matrixyl, Pal-KTTKS, Palmitoyl-Lys-Thr-Thr-Lys-Ser
Overview
Key Facts
Primary Goal: Research and therapeutic applications of Palmitoyl Pentapeptide-4
KTTKS fragment mimics collagen breakdown products to trigger wound-healing response. Activates TGF-beta signaling in fibroblasts to upregulate collagen gene expression.
Dosing Information
~4-6 hours (topical bioactivity window)
2–8 mg
Twice daily (topical application)
Continuous daily use; results typically visible after 8-12 weeks
Benefits
- Stimulates collagen I, III, and IV synthesis
- Reduces wrinkle depth by up to 68% in clinical studies
- Increases skin thickness and dermal density
- Promotes fibronectin and hyaluronic acid production
- Non-irritating and suitable for sensitive skin
- Comparable efficacy to retinol without irritation
Side Effects
Mechanism of Action
KTTKS fragment mimics collagen breakdown products to trigger wound-healing response
Activates TGF-beta signaling in fibroblasts to upregulate collagen gene expression
Stimulates glycosaminoglycan synthesis for improved skin hydration
Palmitoyl anchor facilitates stratum corneum penetration and dermal delivery
Contraindications
Do not use this peptide if any of the following apply:
- Known allergy to any component of the formulation
- Open wounds or severely compromised skin barrier (apply only to intact skin)
Storage & Reconstitution
Unreconstituted (Powder)
Reconstituted (Mixed)
Research Summary
Developed by Sederma (now part of Croda), Matrixyl was introduced in 2000 and became one of the first clinically validated cosmetic peptides. A landmark double-blind study demonstrated that 8 weeks of topical application reduced wrinkle volume by 36% and wrinkle depth by 27% compared to placebo. Subsequent studies confirmed collagen synthesis stimulation in ex vivo human skin models. It remains one of the best-studied and most widely used peptides in anti-ageing skincare.
Frequently Asked Questions
Common questions about Palmitoyl Pentapeptide-4
UK-Specific Information
Exclusive data points and guidance for UK residents using Palmitoyl Pentapeptide-4
UK Lab Testing
UK Lab Testing
Recommended labs: Medichecks, Thriva (£89-£149 for peptide safety panel)
Why this matters: UK-specific lab testing guidance not available on US competitor sites
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Note: Peptide stacking should only be done under the guidance of a qualified healthcare professional. Individual responses may vary.
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