An emollient ester. It softens skin and gives a soft slip, common in color cosmetics. Well tolerated.
Topical application
BLimited evidence. One RCT or several controlled studies with limitations.
A functional emollient. Safe.
Isostearyl Isostearate is an ester of isostearic acid and isostearyl alcohol, a branched fatty molecule. INCI: Isostearyl Isostearate. In a formula it works as a rich emollient: it softens skin, gives creams a smooth enveloping texture, holds moisture, and improves pigment spread in color cosmetics. Its branched structure makes it more oxidation-stable than straight oils. It is a functional sensory component, not a skincare active. Pregnancy safety. Systemic absorption through intact skin is low and there is no evidence of harm. It can be used during pregnancy and lactation. Tolerance. Irritation and allergen potential are low, but rich emollients are introduced more cautiously on very oily, acne-prone skin.
Irritation potential
LowAllergen risk
LowPregnancy
SafeSuitable for
The Evigrade extension adds an evidence panel to iHerb, Sephora, Druni and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
Isostearyl Isostearate is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
Isostearyl Isostearate suits: normal, dry, combination, oily, sensitive.
An emollient ester.
On the Fulton scale 2/5 – low comedogenicity. For acne-prone skin, a rating of 3 or higher suggests choosing an alternative.
The INCI name is Isostearyl Isostearate. It may also appear as: Изостеарил изостеарат.
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