New — Free Peptide Starter Guide (2026): 13 chapters, 34 cited studies

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Palmitoyl Dipeptide-6

Also known as: Biopeptide EL, Palmitoyl Lysine-Threonine

Palmitoyl Dipeptide-6 is a synthetic dipeptide (lysine-threonine) with a palmitoyl fatty acid tail, designed to penetrate the skin barrier and stimulate the extracellular matrix components essential for skin firmness. It activates fibronectin and type IV collagen synthesis, improving skin density and firmness particularly in mature or sagging skin.

Half-Life

Not applicable (topical)

Route

Topical

Category

Skin & Cosmetic, Anti-Aging & Longevity

Studies

50 references

Key Benefits

  • Increases skin firmness and density
  • Stimulates fibronectin and collagen IV production
  • Strengthens the dermal-epidermal junction
  • Reduces skin sagging in mature skin
  • Improves skin texture and smoothness
  • Supports extracellular matrix integrity

Mechanism of Action

Palmitoyl Dipeptide-6 mimics the KTTKS signal sequence found in fibronectin and signals dermal fibroblasts via integrin receptors. It upregulates fibronectin, collagen IV, and lumican expression, reinforcing the dermal-epidermal junction and the structural scaffold of the dermis. The palmitoyl chain enables effective penetration through the stratum corneum for sustained intradermal activity.

Dosing Protocols

Skin Firming (Standard)

Dose
0.005–0.05% in formulation
Frequency
Once or twice daily
Timing
PM preferred; AM with SPF acceptable
Cycle
12–16 weeks, ongoing

Best formulated with complementary signal peptides such as Matrixyl or Argireline for synergistic firming. Consistent use required for visible density improvements.

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Side Effects

  • Generally well-tolerated
  • Rare mild skin irritation in sensitive individuals
  • No known systemic effects at cosmetic concentrations

Contraindications

Known dipeptide or palmitoyl ester sensitivityNot studied in pregnancy at high concentrations

Storage

Store at room temperature in a sealed container away from direct sunlight. Stable in pH 4–8 formulations. Avoid freezing.

  1. 1.
    Protein Acylation Modifications in Sleep Disorders: Mechanisms and Therapeutic Potential

    Lian X, Li X, Wang X, Lu X, Zhang M, Ren L et al. · Journal of molecular neuroscience : MN · 2026ReviewPubMed Verified

  2. 2.
    YAP1 signalling and cancer: molecular pathways reveal novel targeting opportunities

    Wu J, Chen B, Xie F, Hu J, Liang M, Lyu Y et al. · Expert opinion on therapeutic targets · 2026PubMed Verified

  3. 3.
    Palmitoyl-protein thioesterase-1 in health and disease

    Barnes M, Raman R, Ekins S · Trends in pharmacological sciences · 2026ReviewPubMed Verified

  4. 4.
  5. 5.
    Untargeted Metabolomics Investigating the Intracellular Metabolic Alterations of HaCaT Cells Treated with Isotretinoin

    Zhu S, He Y, Wu L, Ouyang X, Wei Q, Ye F et al. · Drug design, development and therapy · 2026PubMed Verified

  6. 6.
  7. 7.
    Bioinformatics Analysis of ZDHHC-protein Acyltransferase for Predicting the Rupture of Aneurysmal Subarachnoid Hemorrhage

    Zhang W, Liu L, Hou Y, Wang W · Current neurovascular research · 2026PubMed Verified

  8. 8.
    Design, Synthesis, and Bioactivity Evaluation of a Palmitoyltransferase Inhibitor Based on the PAP Structure

    Zhang Y, Liu H, Li J, Han X, Ran Z, Zhang L et al. · Chemistry & biodiversity · 2026PubMed Verified

  9. 9.
    ASCT2 palmitoylation regulated by JNK1-ZDHHC14 axis orchestrates glutamine metabolism and NSCLC progression

    Chen X, Ke Z, Wei S, Chen J, Zhu K, Xu J et al. · Cell discovery · 2026PubMed Verified

  10. 10.
    Acute Fatty Liver of Pregnancy and Fetal Fatty Acid Oxidation Disorders: A Systematic Review

    Varotsis D, Araji S, Horgan R, Powel JE, McLaren R Jr, Kirmse B et al. · O&G open · 2026ReviewPubMed Verified

  11. 11.
    Piceatannol as a potential antiviral agent against vaccinia virus at multiple stages

    Zhang L, Liu Y, Li D, Luan J, Zhang L · Frontiers in microbiology · 2026PubMed Verified

  12. 12.
    Dexmedetomidine regulates fatty acid oxidation through the AMPK/PGC-1α/CPT1A pathway to mitigate renal ischaemia-reperfusion injury

    Zhang CL, Yan Y, Wang K, Ma JJ, Xu WJ, Liu G et al. · Toxicology and applied pharmacology · 2026PubMed Verified

  13. 13.
    Anticancer effect of palmitoyl piperidinopiperidine against human pancreatic ductal adenocarcinoma cells

    Yoshioka H, Hamanaka J, Horiuchi A, Horita H, Horiguchi H, Suzui M · Cancer genetics · 2026PubMed Verified

  14. 14.
    Small-molecule enhancement of METTL3 S-palmitoylation as a therapeutic strategy for osteoarthritis

    Qin W, Wei J, Li F, Wang L, Zhang Q, Chen J et al. · Cell reports · 2026PubMed Verified

  15. 15.
    STING Innate Immunity Signalling from the Golgi

    Taguchi T · Sub-cellular biochemistry · 2026ReviewPubMed Verified

  16. 16.
    Role of lipoylation in mitochondrial supercomplex formation during C2C12 cell differentiation

    Oshio H, Shiiba I, Takeda A, Matsumoto S, Ishikawa Y, Nagashima S et al. · Journal of biochemistry · 2026PubMed Verified

  17. 17.
    Alox15 via H(2)O(2) mediates TP receptor palmitoylation and its membrane trafficking leading to platelet activation

    Govatati S, Yadavalli CS, Sunkara A, Rao GN · iScience · 2026PubMed Verified

  18. 18.
    Targeting the ZDHHC9-mediated STAT1 palmitoylation-phosphorylation conversion inhibits gastric cancer progression

    Bai X, Guo YR, Zhang WC, Shi ZH, Dai DQ · Journal of gastroenterology · 2026PubMed Verified

  19. 19.
    Phytochemical study of Homalanthus giganteus: isolation, antiproliferative activity, and computational mechanistic insights of tigliane diterpenes against colorectal cancer

    Wirasisya DG, Kincses A, Setiawansyah A, Barta A, Chang FR, Hohmann J · Pharmaceutical biology · 2026PubMed Verified

  20. 20.
    Sex-dependent rescue of memory and synaptic deficits in AD model mice by increasing PSD-95 palmitoylation

    Du Y, Prinkey K, Pham AQ, Lawrence A, Morales C, Dinata M et al. · Communications biology · 2026PubMed Verified

  21. 21.
    cGAS-IFN-I responses by extracting nuclear DNA from dying cells via nucleocytosis

    Negishi H, Wada Y, Shirasaki Y, Hayashi T, Kubota Y, Iwasaki T et al. · Nature communications · 2026PubMed Verified

  22. 22.
    Thiolactone ring dynamics in dimeric lipids enable pH-switchable supramolecular tuning in surface-engineered quantum dots

    Saha P, Moitra P, Bera S, Das Adhikari S, Pradhan N, Bhattacharya S · Nanoscale · 2026PubMed Verified

  23. 23.
  24. 24.
    Isomer Composition Assessment of Synthetic Phosphatidylethanol by Collision-Induced and Ozone-Induced Dissociation Mass Spectrometry

    Bantle M, Long JOT, Brydon SC, Young RSE, Blanksby SJ, Weinmann W et al. · Drug testing and analysis · 2026PubMed Verified

  25. 25.
    Palmitic acid activates c-Myc via dual palmitoylation-dependent pathways to promote colon cancer

    Du W, Zhang J, Wang Y, Li M, Cao J, Yang B et al. · Cell discovery · 2026PubMed Verified

  26. 26.
    Molecular mechanism of cholesterol-dependent membrane fusion in SARS-CoV-2 entry

    Li W, Wu M, Feng S, Su J, Niu Q, Lin W et al. · Signal transduction and targeted therapy · 2026PubMed Verified

  27. 27.
    A comprehensive analysis of palmitoylation related genes in lung adenocarcinoma

    Jiang J, Li Z, Yan T, He Y, Zhu J, Jin X et al. · Discover oncology · 2026PubMed Verified

  28. 28.
    Fibroblast growth factor 1 alleviates diabetic nephropathy by reducing renal lipid accumulation in diabetic kidney

    Li YJ, Ge HY, Zhang GG, Chen HY, Xi YJ, Wang K et al. · World journal of diabetes · 2026PubMed Verified

  29. 29.
    Lipidation as a post-translational code for protein liquid-liquid phase separation

    Sani SA, Chytła A, Sztacho M · Journal of lipid research · 2026ReviewPubMed Verified

  30. 30.
    Palmitoylation modification of SPI1 promotes nasopharyngeal carcinoma radioresistance through inhibiting c-CBL-mediated ubiquitination and degradation

    Jiang L, Bin Y, Huang Y, Wu L, Qiu X, Du Y et al. · Drug resistance updates : reviews and commentaries in antimicrobial and anticancer chemotherapy · 2026PubMed Verified

  31. 31.
    CSPβ-Hsc70 partnership: Unveiling a chaperone-driven mechanism involved in acrosomal exocytosis in human sperm

    Flores-Montero K, Durán N, Bellavita L, Fontecilla-Escobar J, Gundersen CB, Di Lella S et al. · Life sciences · 2026PubMed Verified

  32. 32.
  33. 33.
    Post‑translational modifications in diabetic kidney disease (Review)

    He M, Wang Z, Miao Z, Zhao Y, Wei L, Zhang L et al. · International journal of molecular medicine · 2026ReviewPubMed Verified

  34. 34.
    Liver Metabolomic Profiling Reveals Distinct Signatures Between Steatosis and Metabolic Dysfunction-Associated Steatohepatitis

    Palomurto S, Flam E, Kaminska D, Virtanen KA, Kärjä V, Käkelä P et al. · Liver international : official journal of the International Association for the Study of the Liver · 2026PubMed Verified

  35. 35.
    SNAP25 undergoes phase separation to facilitate the assembly of the synaptic vesicle fusion machinery

    Zhu M, Jin Y, Liu J, Kong X, Liu Y, Yu H · Cell reports · 2026PubMed Verified

  36. 36.
    Post-Translational Modifications in HIV Infection: Novel Antiretroviral Strategies

    Sun Y, Yang S, Ao Y, Yu W · Cells · 2026ReviewPubMed Verified

  37. 37.
  38. 38.
    S-palmitoylation of the viral Nsp10 by ZDHHC7 restricts PRRSV replication but is counteracted by Nsp2, Nsp4 and GP5

    Jing H, Peng Z, Zhao P, Duan E, Liu J, Zhao X et al. · Research in veterinary science · 2026PubMed Verified

  39. 39.
    Molecular dynamics of the pathogenic KCNQ2 variant G256W reveals mechanisms of channel dysfunction in epileptic encephalopathy

    Thompson EC, Cooper EC, Miller BR 3rd · Journal of biomolecular structure & dynamics · 2026PubMed Verified

  40. 40.
    Emerging roles of protein modifications in sexual reproduction and pathogenesis of filamentous fungi

    Li X, Zhou X, Luo Y, Xue L, Tong X, Guo J · Frontiers in microbiology · 2026ReviewPubMed Verified

  41. 41.
    Lipid nanoparticles containing zwitterionic lipids versatilely enhance the efficiency of mRNA delivery

    Suzuki Y, Yamada Y, Harashima H, Sato Y · Journal of controlled release : official journal of the Controlled Release Society · 2026PubMed Verified

  42. 42.
    Effect of Cholesterol on the Gramicidin A Induced Membrane Curvature and Order Parameter

    Srivastava D, Mukherjee S, Begom M, Patra N · Chemphyschem : a European journal of chemical physics and physical chemistry · 2026PubMed Verified

  43. 43.
    Efficacy, safety, and tolerability of palmitoylethanolamide in the management of diabetic neuropathic pain: a systematic review and meta-analysis

    Prado MB Jr, Nisce NRB, Cayanong EJB, Adiao KJB · Journal of diabetes and metabolic disorders · 2026PubMed Verified

  44. 44.
    Control of Inositol 1,4,5-Trisphosphate Receptor Activity by Posttranslational Modifications

    Vanmunster M, de Ridder I, Callens M, Yule D, Serysheva I, Parys JB et al. · Cold Spring Harbor perspectives in biology · 2026PubMed Verified

  45. 45.
    Aquaporin-4 mediated RONS transport under membrane lipid peroxidation: Atomic-scale mechanistic insights

    Cao Y, Wei H, Jiang S, Yang C, Liu N, Lee I et al. · International journal of biological macromolecules · 2026PubMed Verified

  46. 46.
  47. 47.
    Palmitoyl Acyltransferases Control the Membrane Localization of DNAJC5 to Regulate Unconventional Protein Secretion

    Xu Y, Puthenveetil R, Lee J, Saidi L, Banerjee A, Ye Y · Traffic (Copenhagen, Denmark) · 2026PubMed Verified

  48. 48.
  49. 49.
    Syk activation during FcγR-mediated phagocytosis involves Syk palmitoylation and desulfenylation

    Jansen M, Strub JM, Chaloin L, Coopman P, Beaumelle B · Life science alliance · 2026PubMed Verified

  50. 50.
    Dysfunction of GABAergic interneurons underlies altered neural network oscillations associated with epileptiform activity in PPT1-deficient mice

    Tong J, Liu W, Wang Q, Yang H, Gao Z, Wu W et al. · Translational psychiatry · 2026PubMed 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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