Myristoyl Tetrapeptide-12: Conditioning Lipopeptide for Hair and Skin Keratin Quality
Myristoyl Tetrapeptide-12 (CAS 959610-24-3) is a conditioning lipopeptide designed to improve keratin protein quality in both skin and hair applications. The tetrapeptide sequence is conjugated to myristic acid (C14 chain), providing lipophilic character for effective integration with the keratin-rich structures of the stratum corneum and hair cortex. This dual-application profile makes it particularly valuable for brands developing cross-category product lines spanning skincare and haircare.
Mechanism: Keratin Quality Enhancement
The tetrapeptide core interacts with keratinocytes to promote orderly keratin intermediate filament assembly. In the epidermis, this translates to improved stratum corneum integrity with more uniform corneocyte stacking and tighter intercellular lipid organization. In hair follicles, the peptide supports keratin fiber alignment within the cortex, strengthening the internal structure that determines hair elasticity, tensile strength, and resistance to mechanical damage from brushing, heat styling, and chemical treatments.
Efficacy Performance Data
In an 8-week controlled study measuring hair fiber properties, Myristoyl Tetrapeptide-12 applied at 100 ppm improved tensile strength by 15% compared to placebo-treated hair samples. Tensile testing was performed on individual fiber pull tests using calibrated dynamometry. This improvement correlates with reduced breakage during combing and thermal styling–measurable benefits that consumers report as stronger, more resilient hair. On the skin side, improved keratin organization translates to smoother tactile surface texture and enhanced barrier function metrics including reduced transepidermal water loss.
Formulation Parameters
The myristoyl (C14) chain renders this peptide oil-soluble. Incorporate into emulsion oil phases, leave-on hair oils, conditioning treatments, and anhydrous styling products. Recommended use concentration is 50-200 ppm in finished formulations. The lipophilic character provides natural affinity for keratin surfaces, supporting substantivity in both rinse-off and leave-on product formats. For shampoo applications, pair with cationic deposition aids to maintain peptide contact time on hair during the brief wash cycle.
Target Applications
- Strengthening and repair hair masks for damaged or chemically treated hair
- Leave-on hair serums and thermal protection treatments
- Scalp treatment serums targeting hair quality at the follicular level
- Skin barrier repair creams and overnight recovery treatments
- Hand creams targeting rough, keratin-heavy palmar skin
Complementary Ingredients
For hair applications, combine with hydrolyzed keratin proteins for both structural repair (keratin) and biological signaling (peptide). Adding panthenol (provitamin B5) provides complementary moisture retention within the cortex. For skin formulations, pair with ceramide complexes to reinforce both the protein and lipid components of the epidermal barrier simultaneously. Niacinamide co-formulation supports ceramide biosynthesis while the peptide addresses the keratin structural component.
Supply Chain and Quality
TCS NEXUS S.L. supplies Myristoyl Tetrapeptide-12 from our warehouse in Valencia, Spain operating. Minimum order is 1 g for evaluation trials and 100 g for production batches. EU delivery takes 5-7 business days. Full analytical documentation ships with every lot including HPLC purity analysis, mass spectrometry identity verification, and microbiological safety testing.
Frequently Asked Questions
Can Myristoyl Tetrapeptide-12 be used in both skincare and haircare?
Yes. The peptide targets keratin quality in both skin keratinocytes and hair cortex cells. This makes it suitable for cross-category formulation in barrier repair skincare and strengthening haircare products.
What concentration delivers measurable hair strengthening?
The 100 ppm level produced a 15% tensile strength improvement in 8-week studies. Use the 50-200 ppm range depending on your product format and whether it is a rinse-off or leave-on application.
Is this peptide suitable for rinse-off products?
The oil-soluble nature provides some keratin substantivity, but leave-on formats deliver superior results. For rinse-off products like conditioners and masks, use the higher end of the concentration range (150-200 ppm) and pair with cationic deposition polymers.
Technical Profile
Myristoyl Tetrapeptide-12 is a lipid-modified peptide that supports keratin production and hair follicle vitality, making it an effective active for hair-strengthening treatments, scalp serums, and conditioning formulations targeting thicker, healthier-looking hair.
Best-Fit Applications
- Conditioning and supportive cosmetic development
- Hair-adjacent and keratin-care product concepts
- Broader sourcing comparisons across myristoyl peptides
Related Peptide Portfolio: TCS NEXUS supplies a connected range of anti-aging, brightening, repair, and matrix-support peptides for cosmetic formulators across Europe.
Technical Support and Samples
Request COA documents, sample availability, or support for custom synthesis.