Steareth-20
Ingredient Info
Steareth-20 is a synthetic emulsifier derived from stearic acid (a fatty acid) that helps mix oil and water-based ingredients together in skincare formulas. It's commonly used to create stable, smooth textures in creams and lotions.
Benefits
- Stabilizes emulsions to create smooth, consistent product texture
- Allows oil and water ingredients to blend effectively
- Generally gentler than some alternative detergents used in skincare
Potential concerns
- May cause irritation in sensitive skin at high concentrations
- Can affect cell viability in laboratory settings at elevated levels, though relevance to normal skincare use is unclear
Science: Research shows Steareth-20 has lower in vitro cytotoxicity compared to harsher detergents like sodium lauryl sulfate, requiring much higher concentrations (70% vs. 1%) to produce cell damage in lab studies. However, these laboratory findings use extreme concentrations not typical in finished skincare products, and actual safety in real-world use remains well-established through decades of cosmetic industry use.
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