Matrixyl
Also known as: Palmitoyl Pentapeptide-4, Palmitoyl Lysine-Threonine-Threonine-Lysine-Serine, Pal-KTTKS
Matrixyl is the most widely used collagen-stimulating cosmetic peptide. As a matrikine — a fragment of type I procollagen — it signals skin cells to synthesize new collagen, elastin, and fibronectin, reducing wrinkle depth and improving skin firmness and elasticity.
Half-Life
N/A — topical; sustained signaling effects on fibroblasts persist beyond single application
Route
Topical
Category
Skin & Cosmetic
Studies
11 references
Key Benefits
- Stimulates collagen I, III, and IV synthesis
- Increases fibronectin and glycosaminoglycan production
- Reduces wrinkle depth and length by 27–68% (studies)
- Improves skin firmness and elasticity
- Reduces dark circles and undereye bags
- Synergistic with retinol, vitamin C, and growth factors
- Suitable for all skin types including sensitive
- Well-studied with published clinical data
Mechanism of Action
Matrixyl (Palmitoyl-Lys-Thr-Thr-Lys-Ser) is a matrikine peptide derived from the type I collagen alpha-1 chain propeptide. When collagen degrades (with UV, aging, mechanical stress), it releases fragments that signal fibroblasts to produce new matrix. Matrixyl mimics these fragments. It binds specific receptors on dermal fibroblasts, activating TGF-β signaling and stimulating expression of collagen I, III, IV, fibronectin, and glycosaminoglycans (hyaluronic acid precursors). The palmitoyl chain enables penetration through the lipid-rich stratum corneum.
Dosing Protocols
Anti-Aging Serum
- Dose
- 3–8% concentration
- Frequency
- Once or twice daily
- Timing
- After cleansing, before moisturizer
- Cycle
- Ongoing; significant results in 56–84 days
Combine with Matrixyl 3000 (contains Matrixyl + Palmitoyl Tripeptide-38) for enhanced effect
Intensive Firming Protocol
- Dose
- 5–10% concentration
- Frequency
- Twice daily
- Timing
- AM and PM
- Cycle
- 12 weeks, then maintenance
Pair with sunscreen (AM) to preserve new collagen from UV damage
Calculate your draw volume
Enter your vial size and BAC water to get exact injection volumes
Side Effects
- Exceptional safety profile
- Non-irritating, suitable for sensitive skin
- No known adverse effects at cosmetic concentrations
Contraindications
External use only. Not for injection. No known contraindications for topical cosmetic use. Consult dermatologist if combining with prescription-strength actives.
Storage
Active ingredient: 2–8°C. Finished formulations: cool, dark place per label. Stable 24 months. Avoid high temperatures which may degrade palmitoyl chain.
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Clinical Research
- 1.Synergistic Effects of Injectable Platelet-Rich Fibrin and Bioactive Peptides on Dermal Fibroblast Viability and Extracellular Matrix Gene Expression: An In Vitro Study
Paccola AGL, Santos TMCD, Minelo MC, Garbieri TF, Sanches MLR, Dionísio TJ et al. · Molecules (Basel, Switzerland) · 2025PubMed Verified
- 2.Self-Assembly and Wound Healing Activity of Biomimetic Cycloalkane-Based Lipopeptides
Adak A, Castelletto V, Hamley IW, Seitsonen J, Jana A, Ghosh S et al. · ACS applied materials & interfaces · 2024PubMed Verified
- 3.Boosting Cosmeceutical Peptides: Coupling Imidazolium-Based Ionic Liquids to Pentapeptide-4 Originates New Leads with Antimicrobial and Collagenesis-Inducing Activities
Gomes A, Bessa LJ, Fernandes I, Aguiar L, Ferraz R, Monteiro C et al. · Microbiology spectrum · 2022PubMed Verified
- 4.Matrixyl Patch vs Matrixyl Cream: A Comparative In Vivo Investigation of Matrixyl (MTI) Effect on Wound Healing
Kachooeian M, Mousivand Z, Sharifikolouei E, Shirangi M, Firoozpour L, Raoufi M et al. · ACS omega · 2022PubMed Verified
- 5.The Effects of a Novel Series of KTTKS Analogues on Cytotoxicity and Proteolytic Activity
Tałałaj U, Uścinowicz P, Bruzgo I, Surażyński A, Zaręba I, Markowska A · Molecules (Basel, Switzerland) · 2019PubMed Verified
- 6.N-Terminal Acetylation and C-Terminal Amidation of Spirulina platensis-Derived Hexapeptide: Anti-Photoaging Activity and Proteomic Analysis
Zeng Q, Jiang J, Wang J, Zhou Q, Zhang X · Marine drugs · 2019PubMed Verified
- 7.Turning a Collagenesis-Inducing Peptide Into a Potent Antibacterial and Antibiofilm Agent Against Multidrug-Resistant Gram-Negative Bacteria
Gomes A, Bessa LJ, Fernandes I, Ferraz R, Mateus N, Gameiro P et al. · Frontiers in microbiology · 2019PubMed Verified
- 8.Self-Assembly, Tunable Hydrogel Properties, and Selective Anti-Cancer Activity of a Carnosine-Derived Lipidated Peptide
Castelletto V, Edwards-Gayle CJC, Greco F, Hamley IW, Seitsonen J, Ruokolainen J · ACS applied materials & interfaces · 2019PubMed Verified
- 9.The Reparative Effect of Dendrobium officinale Protocorms against Photodamage Caused by UV-Irradiation in Hairless Mice
Mai Y, Niu Z, He W, Lai X, Huang S, Zheng X · Biological & pharmaceutical bulletin · 2019PubMed Verified
- 10.Collagen stimulating effect of peptide amphiphile C16-KTTKS on human fibroblasts
Jones RR, Castelletto V, Connon CJ, Hamley IW · Molecular pharmaceutics · 2013PubMed Verified
- 11.Thêta-Cream versus Bepanthol lotion in breast cancer patients under radiotherapy. A new prophylactic agent in skin care?
Röper B, Kaisig D, Auer F, Mergen E, Molls M · Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al] · 2004RCTPubMed Verified
Medical disclaimer: This information is for educational purposes only and does not constitute medical advice. Many compounds listed are research chemicals not approved for human use. Always consult a qualified healthcare professional before starting any protocol.
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