Sodium Lauryl Sulfate
Also known as: SLS, Sodium dodecyl sulfate, SDS
Strong anionic surfactant that cleanses by removing oils and dirt from skin and hair.
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Get the appWhat it does
SLS is a highly effective cleansing agent that reduces surface tension and removes sebum, dirt, and makeup. It creates lather and is commonly used in shampoos, body washes, and cleansers. Due to its strength, it can disrupt skin's natural barrier and cause irritation, especially with prolonged exposure.
Benefits
- Highly effective at removing oils and dirt
- Creates rich lather for satisfying cleanse
- Cost-effective and stable ingredient
- Works well in various water-based formulas
Who it suits
- Oily skin (short-term use)
- Non-sensitive skin types
- Needs heavy-duty cleansing
How to use
Use in rinse-off products like cleansers and shampoos; limit contact time to prevent irritation. Follow with gentle moisturizing step.
Pairs well with
Panthenol, Glycerin, Moisturizing emollients, Soothing plant extracts
Be careful pairing with
Cationic surfactants (may reduce efficacy), Strong acids (may reduce stability)
Safety & cautions
SLS is a known skin irritant and can strip natural oils, disrupt the skin barrier, and cause dryness or redness, especially with prolonged contact or in sensitive individuals. Gentler alternatives like SLES or decyl glucoside are often preferred for facial products.
Educational information, not medical advice. Concentration and formulation change how an ingredient behaves.