Stearic Acid
EmollientEmulsifierSurfactantNaturalAlso known as: Octadecanoic Acid, C18:0
A saturated fatty acid found naturally in animal and vegetable fats. Used as an emulsifier, thickener, and skin-conditioning agent.
Routine placement
Moisturizer · AM & PM
Time to results
Immediate softening; ongoing barrier support
Emollient, protective barrier, emulsifies and thickens formulations, improves product stability.
Present in many creams and cleansers. No specific application instructions.
Safe with long history of cosmetic use. CIR-approved. One of the most common fatty acids in skincare formulations.
Cautions
Very well tolerated. Non-comedogenic at typical formulation concentrations.
What does Stearic Acid do for skin?
Stearic Acid is used in skincare primarily as a emollient ingredient. Its effects depend on concentration and formulation. Check the benefits section above for specific details.
Is Stearic Acid safe for sensitive skin?
Stearic Acid is generally well-tolerated, but sensitivity varies by individual. Start with a patch test if you have reactive skin, and introduce gradually into your routine.
Can I use Stearic Acid every day?
For most skin types, daily use is appropriate at standard concentrations. If you experience any irritation, reduce frequency to every other day.
Will Stearic Acid clog pores?
Comedogenicity varies. If you are acne-prone, patch test on a small area first. Many oils and emollients are non-comedogenic at appropriate concentrations.
Does your skincare contain Stearic Acid?
Paste your product's ingredient list to check, or create your Skinularity ID for a full routine.
Find Stearic Acid products
Browse skincare products containing Stearic Acid.
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