Phytosteryl Isostearate

Phytosteryl Isostearate molecular structure
molecular structure · PubChem
AKA: Plant sterol isostearate
Plant-Derived
Skin Conditioner
Hair Care
Clean
OriginDerived from plant-based phytosterols and isostearic acid, typically sourced from vegetable oils. Produced through esterification of phytosterols with isostearic acid using chemical catalysts.
16-Methylheptadecanoic acid, phytosterols ester
Form
Liquid
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
Functions
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
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
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
Leave-on0.003–3%
Rinse-off0.5%
0%50%100%
CIR reported use · report published 2013
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR