Colloidal Oatmeal
Finely ground oat flour with anti-inflammatory, moisturizing, and barrier properties. FDA-approved as an OTC skin protectant. Avenanthramides are the active anti-inflammatory compounds.
Evidence by route
Topical application
FDA approved as an OTC skin protectant. RCTs confirm reduced itch, erythema, and TEWL in atopic dermatitis. Avenanthramides inhibit NF-kB and reduce pro-inflammatory cytokine production.
- Reynertson KA et al. J Drugs Dermatol. 2015;14(1):43-48. PMID 25607907
- Fowler JF et al. J Drugs Dermatol. 2012;11(7):804-807. PMID 22777219
How to read tiers A–F
- AProven efficacy. Two or more independent RCTs with instrumental endpoints
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Sensitive, Dry, Normal, Combination
About this ingredient
Colloidal Oatmeal (INCI Avena Sativa (Oat) Kernel Flour) is finely ground oat flour with anti-inflammatory, moisturizing and barrier-restoring properties. FDA approved it as an OTC skin protectant in 2003. Composition and mechanism. Beta-glucans (water-retaining polysaccharides), avenanthramides (phenolic compounds with anti-inflammatory activity), starch, proteins, lipids. Avenanthramides suppress NF-κB and reduce histamine release, which explains the anti-itch effect. Beta-glucans form a protective film and stimulate collagen synthesis in vitro. Where applied. Creams and lotions for atopic dermatitis, anti-itch products, post-procedure care, bath products, cleansers for sensitive skin. In Spain – Aveeno (the default oat brand), CeraVe SA Smoothing, La Roche-Posay Lipikar AP+M, Cantabria Labs dermatologic lines. Evidence base. Reynertson 2015 meta-analysis showed colloidal oatmeal reduces itch and erythema in mild-to-moderate atopic dermatitis within 2 weeks. Sobhan 2020 RCT in radiation dermatitis: 1% colloidal oatmeal reduced symptom severity by 40% vs control. AAD recommends colloidal oatmeal as an adjunct measure in atopy. Safety. CIR and FDA confirmed safety. Hypoallergenic, non-comedogenic. Allergic reactions are rare even in gluten-intolerant patients (oats don't contain gluten; cross-reactivity with wheat is possible but very rare). Pregnancy and lactation – safe. Suitable for atopic infants – oatmeal baths are a standard pediatric recommendation. Best suited to: atopic dermatitis, contact dermatitis, dry-skin itch, post-procedure recovery, post-retinoid dermatitis, post-burn recovery, rosacea in active inflammation, perioral dermatitis. One of the most versatile soothing actives.
Frequently asked questions
Is Colloidal Oatmeal safe during pregnancy?
Colloidal Oatmeal is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Colloidal Oatmeal for?
Colloidal Oatmeal suits: sensitive, dry, normal, combination.
What is Colloidal Oatmeal and what does it do in cosmetics?
Finely ground oat flour with anti-inflammatory, moisturizing, and barrier properties.
What's the INCI name for Colloidal Oatmeal?
The INCI name is Avena Sativa (Oat) Kernel Flour. It may also appear as: Colloidal Oatmeal, Avena Sativa Kernel Flour.
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