Phytosteryl Butyrate
AKA “Plant sterol butyrate, Phytosterol butyrate
Skin Conditioning
Ingredient Facts
Phytosteryl butyrate
AKA: Plant sterol butyrate, Phytosterol butyrate
Skin Conditioning · Hair Conditioning · EWG: 4
Synthetic
Skin Conditioner
Hair Care
Not Clean
Phytosteryl Butyrate is the ester of Phytosterol and Butyric Acid
CAS #
-
Form
Wax
See origin →
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
Traditional Use
A modern synthetic ester created by combining plant-derived phytosterols with butyric acid. Developed in the late 20th century for use as an emollient and skin conditioning agent in contemporary cosmetics.
Skin Types
all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: CosIng · EWG · CIR