Researched by Helena DeMaria-Williams
Formula IngredientEmollientStearic Acid
INCI: Stearic Acid
Stearic acid is a common saturated fatty acid (C18:0) found naturally in many animal and vegetable fats. It is a multi-tasker in cosmetic formulations, functioning as an emollient that softens and smooths the skin, a viscosity controller that adds body and texture to creams, and an emulsion stabiliser that helps water and oil phases stay blended. It is one of the most widely used fatty acids in skincare and personal care products.
Category
Emollient
Irritation Risk
Low
Skin Types
dry, normal, combination, mature, sensitive
What does this do in a formula?
skin softening, emolliency, emulsion stabilisation, viscosity control, texture enhancement, skin barrier support
Is Stearic Acid safe? Key considerations
Can Stearic Acid cause irritation?
Low RiskIrritancy rating of 0 — stearic acid is non-irritating at typical cosmetic concentrations. It is a naturally occurring fatty acid present in the skin's own lipid barrier. CIR (Cosmetic Ingredient Review) has confirmed its safety. No EU CosIng Annex II or III restrictions apply.
Does Stearic Acid increase sun sensitivity?
No RiskStearic acid does not increase photosensitivity. No sun protection precautions are required.
Is Stearic Acid safe during pregnancy?
SafeStearic acid is a naturally occurring fatty acid found in foods and in the skin's own lipids. It is universally considered safe during pregnancy at all cosmetic concentrations. No reproductive or developmental concerns noted.
How does Stearic Acid work?
Stearic acid is a common saturated fatty acid (C18:0) found naturally in many animal and vegetable fats. It is a multi-tasker in cosmetic formulations, functioning as an emollient that softens and smooths the skin, a viscosity controller that adds body and texture to creams, and an emulsion stabiliser that helps water and oil phases stay blended. It is one of the most widely used fatty acids in skincare and personal care products.
Individuals with very acne-prone skin (in high concentrations) should review the considerations above before use.
Which products contain Stearic Acid?
Shop products that contain Stearic Acid
Succinic Acid Treatment
Vitamin B, C and E Moisturiser
Natural Moisturizing Factors + HA
Natural Moisturizing Factors + PhytoCeramides
