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Isocetyl Stearate

What Isocetyl Stearate is & what it does

Isocetyl Stearate is an ester of a branched fatty alcohol and stearic acid, used in cosmetics as an emollient and skin-conditioning agent. In creams and sunscreens it smooths the skin surface and gives the product a rich, spreadable, non-tacky feel. Its branched structure keeps it liquid and lends a light, silky slip.

What does Isocetyl Stearate do in skincare?

Isocetyl Stearate is an emollient and skin-conditioning agent. It smooths the skin surface and gives creams and sunscreens a rich, spreadable, non-tacky feel. Its branched structure keeps it liquid and adds a light, silky slip.

Is Isocetyl Stearate comedogenic?

Isocetyl Stearate is sometimes reported as having moderate comedogenic potential, so very acne-prone skin may want to be cautious. Reactions vary a lot between individuals and depend on the full formula and concentration. Patch testing a new product is sensible if you are prone to breakouts.

Is Isocetyl Stearate natural or synthetic?

Isocetyl Stearate is synthetic, made by combining a branched fatty alcohol with stearic acid. The fatty raw materials can be plant-derived, but the final ester is a processed ingredient rather than a naturally occurring one.

Sunscreens with Isocetyl Stearate

We rate 13 sunscreens that contain it, showing the top 10 by overall score:

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