Authority source
Safety basis: FDA
FDA
Sodium Lauryl Sulfate
SLSSodium Dodecyl Sulfate
Surfactant
Sodium Lauryl Sulfate is a type of soap that helps create a rich lather in products like shampoos and body washes. It also helps other ingredients mix together and work well.
What it is
Sodium Lauryl Sulfate is a type of anionic surfactant derived from coconut or palm oil.
Found in
shampoos, body washes, toothpastes, mouthwashes, and some cosmetics
The concern
Some people may experience skin irritation or allergic reactions to Sodium Lauryl Sulfate, especially with prolonged use or high concentrations.
Legal status
Generally recognized as safe by the FDA, but concentrations above 30% may require special labeling.
Context-dependent
It is usually fine in rinse-off products, but higher concentrations, leave-on use, and sensitive skin can make it more irritating.
Evidence & sources
Article / explainer
Article / explainer
No highly relevant article explainer found yet.
Community questions
Community questions
Community discussions are not used as safety evidence and no highly relevant discussion is shown for this ingredient.
Related ingredient guides
Compare this ingredient with related ingredients and common alternatives.
Sodium Laureth Sulfate
A close surfactant comparison people make when checking irritation.
Sodium Coco Sulfate
A sulfate cleanser often compared with SLS.
Sodium Cocoyl Isethionate
A milder cleanser alternative often compared with sulfates.
Cocamidopropyl Betaine
A common cleanser ingredient checked in the same wash formulas.
Last updated: June 8, 2026