Hydroxypropyl Oxidized Starch
AKA “Modified Starch, Oxidized Starch”
Ingredient
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Ingredient Facts
Hydroxypropyl oxidized starch
AKA: Modified Starch
Ingredient · Film Forming · EWG: 4
Synthetic
Occlusive
Not Clean
Hydroxypropyl Oxidized Starch is the reaction product of oxygen and Hydroxypropyl Starch
Form
Powder
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Creates Protective Barrier
Reduces Inflammation
Locks In Moisture
Fights Bacteria
Traditional Use
Starch was chemically oxidized and hydroxypropylated in the 20th century to create a thickening and texturizing agent. Used in cosmetics as a natural-origin alternative to synthetic polymers.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Concentration Guide
Dermal absorption: 2%. Source: CIR Safety Assessment (CIR Seq 680).
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR