Stearic acid is a common saturated fatty acid found in many animal and vegetable fats. In cosmetics, it acts as an emulsifier, emollient, and thickener, helping to bind ingredients together and provide a smooth texture. It can also help to support the skin's natural barrier.
NoneFatty acidEvidence: High
BenefitModerate 1.5 / 4
Barrier support
Hydration
RiskVery low 0 / 4
Rated by SpottyLabs' ingredient methodology, independent of brands.
What it helps with
Emulsifies oil and water
Thickens formulations
Softens skin
Supports skin barrier
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Stearic acid is generally considered non-irritating and can be beneficial for sensitive skin due to its emollient and barrier-supporting properties.
What is the difference between stearic acid and other fatty acids?
Stearic acid is a saturated fatty acid, meaning it has no double bonds in its carbon chain, which contributes to its stability and solid form at room temperature, unlike unsaturated fatty acids.
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