Science
Mechanism of Action
As the sodium salt of Linoleic Acid (LA), Sodium Linoleate integrates into the skin's lipid barrier, primarily by contributing to the formation of ceramides (specifically CER[EOS]). This process significantly enhances skin barrier function and hydration, which in turn promotes wound healing by facilitating neutrophil and keratinocyte migration and accelerating the inflammatory response. Furthermore, LA can help regulate sebum fluidity, reducing the likelihood of pore clogging, and may offer skin brightening effects through tyrosinase inhibition. In cosmetic formulations, Sodium Linoleate functions as an emulsifier and surfactant, enabling the stable mixing of immiscible liquids and reducing surface tension.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Sodium Linoleate is sensitive to light, air, heat, and moisture (hygroscopic), and is noted to decompose during storage. Optimal storage conditions are typically between 0-10°C in a dry, well-ventilated environment.
Conflicts
- strong bases
- oxidizing agents
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Sodium Linoleate is safe in current practices of use and concentration when formulated to be non-irritating and non-sensitizing. The EPA has classified it as a 'Green circle' chemical, indicating low concern. While a maximum concentration of 84.7% is noted for a mixture containing Sodium Linoleate in rinse-off products, Linoleic Acid (its parent compound) is used at up to 3.4% in leave-on skincare products.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A valuable skin-conditioning agent that supports barrier integrity, regulates sebum, and offers crucial cosmetic formulation properties, compatible with all skin types when formulated appropriately.
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