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Palmitoyl Pentapeptide-4 (Matrixyl)
Also known as: Matrixyl, Pal-KTTKS, Palmitoyl-Lys-Thr-Thr-Lys-Ser
Confidence
Updated 2026-03-18
Palmitoyl Pentapeptide-4 (Matrixyl) is one of the most well-studied cosmeceutical peptides, developed by Sederma. It is a lipopeptide fragment of pro-collagen I that stimulates collagen and extracellular matrix production in the skin. It was one of the first peptides to demonstrate anti-aging efficacy in peer-reviewed dermatology studies and has become a staple ingredient in anti-aging skincare formulations worldwide.
Class
Skin / Collagen-Stimulating Peptide
Routes
Topical
Half-Life
Not applicable (topical cosmeceutical). Local skin depot effect dependent on formulation.
The pentapeptide KTTKS is a fragment of type I pro-collagen that acts as a matrikine — a signaling peptide released during ECM remodeling. When applied topically, it signals fibroblasts to increase production of collagen I, collagen III, and fibronectin. The palmitoyl (C16 fatty acid) modification enhances skin penetration through the lipid-rich stratum corneum. It also stimulates hyaluronic acid synthesis and inhibits MMP-1 (collagenase) activity, providing both pro-synthetic and anti-degradation effects.
Half-Life
Not applicable (topical cosmeceutical). Local skin depot effect dependent on formulation.
Bioavailability
Topical: enhanced penetration due to palmitoyl lipid anchor compared to non-lipidated peptides. Exact dermal bioavailability not quantified but superior to most cosmeceutical peptides.
No FDA-approved indications (cosmetic use). Cosmeceutical: photoaging, fine lines and wrinkles, skin firmness/elasticity, collagen loss prevention, post-procedure skin recovery.
Among the most studied cosmeceutical peptides. Robinson et al. (2005, International Journal of Cosmetic Science) demonstrated significant improvement in wrinkle depth and roughness after 12 weeks of topical application. Subsequent studies confirmed collagen synthesis stimulation in human skin explants. Sederma-sponsored studies show up to 68% wrinkle reduction. Independent studies generally confirm modest but real improvements in skin texture and collagen markers. Better evidence base than most cosmeceutical peptides.
Human Studies
10
Animal Studies
8
Topical: excellent safety profile. Very well-tolerated. Rare skin irritation. Non-sensitizing in repeated patch tests. No systemic effects. Used safely in millions of cosmetic products worldwide.
Unclassified — cosmetic ingredient. Not regulated as a drug. One of the most commercially successful cosmeceutical peptides. Found in products from Olay, StriVectin, and hundreds of other brands.
Drug Interactions: None known for topical use. Can be combined with retinoids, vitamin C, and other anti-aging actives. Monitoring: Visual/photographic skin assessment. Biophysical measures (skin elasticity, collagen density via ultrasound) in research settings. Research Gaps: Optimal concentration for maximal collagen stimulation. Head-to-head with retinoids (the gold standard). Long-term collagen production maintenance. Combination protocol optimization.
Topical (facial/body application)
Common Range
2–8 ppm (parts per million) or 100–500 ppm depending on formulation; ~4% in commercial products
Timing
Morning and/or evening after cleansing
Frequency
Twice daily
Cycling
Continuous use (cosmeceutical). Effects build over 4–12 weeks.
Important Note
Cosmeceutical — not a drug. One of the best-studied anti-aging peptides. Results are cumulative. Often combined with Matrixyl 3000 (palmitoyl tripeptide-1/palmitoyl tetrapeptide-7) for enhanced effect.
Connect with a verified provider offering Palmitoyl Pentapeptide-4 therapy near you.
Tissue Repair / Anti-Aging
GHK-Cu is a naturally occurring copper-binding tripeptide found in human plasma, saliva, and urine. Levels decline significantly with age (from ~200 ng/mL at age 20 to ~80 ng/mL at age 60). It has gained attention for its broad biological activities including wound healing, anti-inflammatory effects, collagen synthesis, and potential gene expression modulation.
Hair & Skin Peptide
AHK-Cu is a copper-binding tripeptide (Ala-His-Lys) structurally related to GHK-Cu but with distinct biological activity favoring hair follicle stimulation. It has shown the ability to stimulate hair growth and increase hair follicle size in preclinical studies, positioning it as a topical peptide for hair loss treatment. It is used in cosmeceutical and trichology formulations alongside GHK-Cu.
Cosmetic / Anti-Wrinkle Peptide
Snap-8 is an octapeptide used in cosmeceutical formulations as a topical anti-wrinkle agent. It is an elongated analog of Argireline (Acetyl Hexapeptide-3) designed to modulate the SNARE complex involved in neuromuscular junction signaling, thereby reducing muscle contraction intensity and expression line depth. It is marketed as a "topical Botox alternative," though this comparison significantly overstates its efficacy.
Disclaimer: This content is for educational and informational purposes only and does not constitute medical advice. Always consult with a licensed healthcare provider before starting, stopping, or modifying any peptide therapy. PeptideSupplierMatch does not prescribe, sell, or distribute peptides.
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