What it does
- Soothes dry, itchy and sensitive skin.
- Supports the barrier and helps retain moisture.
- Provides antioxidant, anti-irritant character.
How it works
Colloidal oatmeal combines several useful components: beta-glucans and starches that hold water and form a soothing film, lipids that support the barrier, and avenanthramides (oat polyphenols) widely documented for anti-irritant and antioxidant activity. Together these calm and comfort compromised skin.
Use level
- Typical use level
- commonly ~1–5% in formulas
Commonly used at around 1–5% in cosmetic formulas. In the US it is a recognised over-the-counter skin protectant, which is part of why it appears in eczema-friendly and sensitive-skin products.
Formulation considerations
- Dispersed as a colloidal suspension rather than dissolved; ensure even dispersion.
- Broadly compatible and gentle.
- Adds a soft, cushiony skin feel.
What it pairs with & what to avoid
Pairs well with
- Ceramides, panthenol, allantoin, centella (soothing/barrier)
- Humectants and occlusives
Use with care / avoid
- Poor dispersion (grittiness); mill/disperse adequately
Regulatory status
Colloidal oatmeal is listed in the EU CosIng database and is recognised as an over-the-counter skin protectant in the US, reflecting its well-established soothing role.
Common questions
What does colloidal oatmeal do?
It soothes dry, itchy and sensitive skin, supports the barrier and helps retain moisture.
Is colloidal oatmeal good for eczema-prone skin?
It is a mainstay of sensitive and eczema-friendly products and is a recognised skin protectant in the US; individual needs vary.
What percentage of colloidal oatmeal is used?
Commonly around 1–5% in cosmetic formulas.