Avena sativa (Oat) starch
AKA: Common Oat, Oat Starch
Plant-Derived Synthetic
Clean
Avena Sativa (Oat) Starch is a cosmetic ingredient used as absorbent, viscosity controlling. Rated low hazard by EWG. Assessed as safe by the CIR.
CAS #
9005-25-8
Form
Powder
Functions
Absorbent
Viscosity Controlling
Absorbs Excess Oil
Controls Viscosity
Antioxidant Protection
Reduces Inflammation
Wound Healing
Controls product thickness
Traditional Use
Oat starch has been used in traditional skincare and folk medicine for its soothing, protective, and gentle absorbent properties, particularly valued for sensitive skin.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
ewg-1
medical-approval
pregnancy-nursing-safe
all-shades-safe
Concentration Guide
Dermal absorption: 2%. Source: CIR Safety Assessment (CIR Seq 680).
Regulatory Agencies
Skin Types
●all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: Kew POWO · CosIng · EWG · CIR