Cetearyl alcohol in skincare

What is cetearyl alcohol?

Cetearyl alcohol and cetostearyl alcohol are two names for the same mixture of cetyl alcohol and stearyl alcohol. These belong to the fatty alcohol family. Do not confuse cetearyl alcohol with ethyl alcohol, also called ethanol, or with denatured alcohol. Similar names do not make them interchangeable ingredients.12

Why is it in an "alcohol free" product?

In US cosmetic labeling, "alcohol" written on its own means ethyl alcohol. An "alcohol free" cosmetic can still contain fatty alcohols, including cetearyl alcohol. The front label is using shorthand, not hosting a chemistry lecture. If you need to avoid a particular ingredient, read the full ingredient list rather than relying on the front label.1

Can cetearyl alcohol cause an allergy?

Yes, but positive allergy tests to cetearyl alcohol have been uncommon in patients being investigated for dermatitis. Previously reported testing found positive reactions in 1% or fewer of consecutively tested patients. In a separate investigation involving selected patients tested for lanolin allergy, cetearyl alcohol produced positive reactions in 6 of 407 patients in one testing series and 1 of 214 in another. Those figures describe patients referred for testing, not the chance that any skincare user will develop an allergy.34

Contact dermatitis means skin inflammation after contact with a substance. An allergic reaction involves the immune system; irritation does not. Allergic contact dermatitis often causes itching and a delayed rash, commonly appearing 24 to 48 hours after exposure. Irritation can cause burning, pain, dryness and rough skin. These symptoms overlap, so a rash after using a cream does not identify cetearyl alcohol as the cause.56

A product you have used comfortably for years can still become a problem: contact allergy can develop after years or even decades of exposure. People with atopic dermatitis, a type of eczema, are also more prone to irritant contact dermatitis. That increased risk concerns irritation generally, rather than a diagnosis of cetearyl alcohol allergy.6

Keep it away from the eyes

Do not apply formulations containing cetearyl alcohol near the eyes, and wash your hands after use. Epimax Ointment and Epimax Paraffin Free Ointment have a specific restriction: use them only on the body, not the face. Eye contact with these ointments has caused serious eye symptoms, including pain, redness, watering, light sensitivity and blurred vision. If either ointment gets into your eyes, rinse well with water and seek medical advice.2

What should you do if a product causes a rash?

1. 1Stop further exposure to the suspected product. Wash the affected area with plenty of water to remove any irritant still on the skin.
2. 2Tell your clinician about new soaps, lotions, cosmetics and other substances touching the affected area. Bring a product that caused a reaction when you tested it on a small area.
3. 3Arrange an assessment if the reaction is severe, keeps returning or does not improve with treatment. Repeated itchy rashes can warrant medical patch testing.

A contact dermatitis rash can persist for weeks after exposure stops. Most cases clear in 2 to 3 weeks, but the rash can return if the trigger remains unidentified or you encounter it again. Avoiding the actual trigger matters more than removing every ingredient with "alcohol" in its name.6

Get medical advice for severe pain, blisters around the eyes or mouth, fever, or signs of infection such as warmth, yellow or green fluid, or red streaks. Seek immediate medical attention for a sudden, rapidly spreading rash, trouble breathing or facial swelling.5

How do you find out whether cetearyl alcohol is the trigger?

Medical patch testing checks for delayed skin allergies, unlike a skin prick test, which checks for an immediate reaction. A dermatologist places small amounts of suspected allergens under patches, usually on your back. The patches normally stay in place for 48 hours, with a further appointment after 4 to 7 days to check for delayed reactions. Keep the patches dry and follow the clinic's instructions so the results are usable.7

More than one substance can cause an allergy, and the first round of testing does not always find the trigger. A dermatologist can test additional substances and use the results to plan what you should avoid. An ingredient list gives you names to investigate, not a villain conveniently highlighted in bold.7

Before testing, tell the clinician about every medicine you take because some medicines affect test results. Do not stop a medicine unless your clinician tells you to. Patch testing investigates allergy; irritant contact dermatitis is assessed through symptoms, examination and exposure history instead.5