INGREDIENT · OAT
Colloidal oatmeal in skincare: itch, eczema and the evidence
Colloidal oatmeal is one of the few soothers with real trials behind it, including one that matched a prescription barrier cream. It is also an ingredient where the label is vaguer than the studies.
You may see it written as
- Avena Sativa (Oat) Kernel Extract
- Colloidal Oatmeal
What colloidal oatmeal is
Colloidal oatmeal is oat (Avena sativa) ground into a fine powder, and it has been a centuries-old topical treatment for skin rashes, redness, burns, itch and eczema.1 A review of the evidence says in-vitro and in-vivo studies have confirmed anti-inflammatory, barrier-repair and moisturising properties.2
A 2015 study made four extracts of colloidal oatmeal and found they diminished pro-inflammatory signals in vitro and had direct antioxidant activity.1
What the trials found
In the same 2015 paper, 29 women with mild to moderate itch and dry lower legs used a colloidal oatmeal skin protectant lotion. They showed significant improvements in dryness, scaling, roughness and itch intensity.1
A 2012 review of studies in atopic dermatitis, with patients aged 3 months to 60 years who kept their usual treatments, found that daily moisturisers or cleansers containing colloidal oatmeal significantly improved investigator assessment, eczema severity scores, itch, dryness and quality of life. The formulations were well tolerated in babies, children and adults.2
The one that gets cited most is a randomised trial of 90 children aged 6 months to 18 with mild to moderate eczema. A 1% colloidal oatmeal cream, sold without prescription, was non-inferior to a prescription barrier cream on eczema severity at week 3, and itch improved in both groups. No safety issues were identified.3 The trial was funded by a consumer-products company, and its authors work there.3
Be a careful reader. Most of these studies are by people connected to the companies that make oat products, and several are adjuncts, meaning people kept their normal treatment. The honest summary is: promising, consistent and well tolerated, not a replacement for medical treatment.
Using colloidal oatmeal with other products
The eczema studies above used colloidal oatmeal as an adjunct, with patients keeping their prescribed treatments, and the formulations were well tolerated.2 That is about eczema medicines. We did not find studies of it layered with cosmetic actives such as retinoids or acids.
Colloidal oatmeal in pregnancy and breastfeeding
We found no pregnancy- or lactation-specific evidence for this ingredient.
Evidence on cosmetic products in pregnancy is limited overall, so ask your doctor or midwife about the specific product you use.4
What you will see on the label
The names to look for are Avena Sativa (Oat) Kernel Extract or oat in another form. In Snifff, it reads as Low risk. For the rest of the formula, see what the score means and how to read the list.
As Snifff shows itAvena Sativa (Oat) Kernel Extract
Pregnancy and nursing
We found no pregnancy- or lactation-specific evidence for this ingredient.
Wording as it appears in the extension, which can change between releases.
A FEW MORE ANSWERS
Common questions about colloidal oatmeal
Is colloidal oatmeal good for eczema?
A review reports that daily products with colloidal oatmeal improved eczema severity, itch, dryness and quality of life as an adjunct to usual treatment.2 In 90 children, a 1% cream was non-inferior to a prescription barrier cream.3
Is colloidal oatmeal safe for babies?
A review reports that colloidal oatmeal formulations were well tolerated in babies, children and adults with eczema.2 Check with your paediatrician before using a new product on a baby.
Is oat extract the same as colloidal oatmeal?
Not necessarily. The studies tested colloidal oatmeal products, and the label may name oat in a different form. Snifff lists the kernel extract as its own entry.
Is colloidal oatmeal safe in pregnancy?
Snifff found no pregnancy-specific evidence for Colloidal oatmeal. Ask your doctor or midwife about the product you use.
WHERE THIS COMES FROM
Sources
- Anti-inflammatory activities of colloidal oatmeal (Avena sativa) contribute to the effectiveness of oats in treatment of itch associated with dry, irritated skinReynertson KA, et al. · Journal of Drugs in Dermatology · 2015
- Colloidal oatmeal formulations as adjunct treatments in atopic dermatitisFowler JF, et al. · Journal of Drugs in Dermatology · 2012
- Efficacy and safety of an over-the-counter 1% colloidal oatmeal cream in the management of mild to moderate atopic dermatitis in children: a double-blind, randomized, active-controlled studyLisante TA, et al. · Journal of Dermatological Treatment · 2017
- Cosmetic dermatology in pregnancy and lactation: a risk-benefit framework for clinical practiceKovacs T, et al. · International Journal of Dermatology · 2026
This page explains an ingredient. It is not medical advice, and it is not an assessment of any product. If you are pregnant, breastfeeding, or have a skin condition, ask your doctor or pharmacist.