Sodium lauryl sulfate (SLS) is an anionic surfactant. In simpler terms, it's a powerful cleansing agent that creates a rich lather and effectively removes oil and dirt. It's the reason shampoos and shower gels foam up so well and clean so effectively.
When choosing a product with SLS, consider your skin type, health conditions, and other individual factors.
The main downside of sodium lauryl sulfate is how harsh it can be on skin. It doesn't just wash away dirt—it also strips the skin's natural protective lipid layer. This can lead to dryness, flaking, irritation, redness, and a tight feeling after washing.
People with sensitive skin, or conditions like eczema, rosacea, or atopic dermatitis, tend to notice this most. Children's skin is also more vulnerable, since it's thinner and has a weaker protective barrier.
In other cases—like non-dry body skin or an oily scalp—SLS may be worth trying.
The more other surfactants a product contains, the lower the percentage of SLS—and as a result, the less drying and irritating it'll be.
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