Isomerized Linoleic Acid
AKA “Linoleic Acid, Polymerized Linoleic Acid”
Acid
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Ingredient Facts
Isomerized linoleic acid
AKA: Polymerized Linoleic Acid
Acid · Film Forming · EWG: 1
Synthetic
Occlusive
Skin Conditioner
Plant Oil
Acid
Clean
9,12-octadecadienoic acid, isomerized
Form
Powder
State
Solid
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Locks in moisture
Traditional Use
Modern synthetic derivative of linoleic acid (an essential fatty acid found in plants). Chemically modified to improve stability in cosmetics while retaining skin-conditioning properties of the natural precursor.
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
Dilinoleic Acid/Butanediol Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Isomerized Linoleic Acid
European Commission
EU Cosmetic Ingredient Database (CosIng)
PEG-8 Dimethicone/Dimer Dilinoleic Acid Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Trilinoleic Acid
European Commission
EU Cosmetic Ingredient Database (CosIng)
Dilinoleic Acid
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Dilinoleic Acid/Butanediol Copolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Isomerized Linoleic Acid
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Linoleic Acid
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Efficacy of an emollient containing diethylene glycol/dilinoleic acid copolymer for the treatment of dry skin and pruritus in patients with senile xer
Izumi R, Negi O, Suzuki T, Tominaga M, Kamo A et al.
Journal of cosmetic dermatology, 2017
Linoleic Acid Induced Changes in SZ95 Sebocytes-Compariso...
Dóra Kovács, Emanuela Camera, Szilárd Póliska, Alessia Cavallo, Miriam Maiellaro, Katalin Dull + 4 more
Nutrients, 2023
Effect of a combination of medium chain triglycerides, linoleic acid, soy lecithin and vitamins A and E on wound healing in rats.
Magalhães MS, Fechine FV, Macedo RN, Monteiro DL, Oliveira CC et al.
Acta cirurgica brasileira, 2008
Fatty acid composition and productive traits of broiler fed diets containing conjugated linoleic acid.
Sirri F, Tallarico N, Meluzzi A, Franchini A
Poultry science, 2003
The Role of Linoleic Acid in Skin and Hair Health: A Review.
Xi Wang, Yan Jia, Huaming He
International journal of molecular sciences, 2024
The Role of Linoleic Acid in Skin and Hair Health: A Review.
Xi Wang, Yan Jia, Huaming He
International journal of molecular sciences, 2024
Verified Jun 2026
Data: CosIng · EWG · CIR