Myristoyl Pentapeptide-4
AKA “MYR-KTTKS, COLLASYN 514KS, PMA59A699X, MYRISTOYL PENTAPEPTIDE-3, MYR-LYS-THR-THR-LYS-SER, RefChem:201869, MYRISTOYL PENTAPEPTIDE-4 [INCI], 1392416-25-9, orb1943036”
Skin Conditioning
Ingredient Facts
Myristoyl pentapeptide-4
AKA: MYR-KTTKS, COLLASYN 514KS, PMA59A699X, MYRISTOYL PENTAPEPTIDE-3, MYR-LYS-THR-THR-LYS-SER, RefChem:201869, MYRISTOYL PENTAPEPTIDE-4 [INCI], 1392416-25-9, Orb1943036
Skin Conditioning · Skin Conditioning · EWG: 1
Synthetic
Skin Conditioner
Amino Acid
Clean
Myristoyl Pentapeptide-3 is the reaction product of Myristic Acid with a synthetic peptide containing Threonine, Serine and lysine
Formula
C37H71N7O10
Mol. Weight
774.00
CAS #
-
See origin →
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Boosts collagen production
Reduces fine lines
Traditional Use
Modern synthetic peptide conjugate derived from myristic acid, developed in recent decades as a cosmetic active claimed to support skin firmness and elasticity; no traditional use.
Skin Types
●all-skin-types
Best For
Wrinkles
Pregnancy & Breastfeeding Safe
Yes
Final Report: Safety Assessment of Myristoyl Pentapeptide-4, Palmitoyl Pentapeptide-4 and Pentapeptide-4 as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Myristoyl Pentapeptide-4
European Commission
EU Cosmetic Ingredient Database (CosIng)
Myristoyl Pentapeptide-4
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR