Is Sodium Lauryl Sulfate Banned? EU vs US Status, Risks & Where It Hides
TL;DR: Sodium Lauryl Sulfate is allowed in the EU but allowed in the US (surfactant).
INCI name SODIUM LAURYL SULFATE. Also called SLS. CAS 151-21-3.
Other names: SLS, Sodium Dodecyl Sulfate, SDS
Is Sodium Lauryl Sulfate banned in the EU?
| EU status | Allowed |
|---|---|
| US status | Allowed |
| Risk level | low |
| Where it shows up | Colgate Total Whitening Toothpaste, Prell Classic Clean Shampoo, Suave Essentials Body Wash, St. Ives Apricot Scrub |
| CAS number | 151-21-3 |
What is Sodium Lauryl Sulfate?
Sodium lauryl sulfate is an anionic surfactant derived from lauryl alcohol (from coconut or palm oil). It is one of the oldest and most-studied cosmetic surfactants, prized for its powerful foaming and degreasing properties. Unlike SLES, it is not ethoxylated.
Why is Sodium Lauryl Sulfate used in personal-care products?
SLS is used as a primary surfactant for its excellent cleansing and lathering ability. It is also used as an emulsifier and penetration enhancer in certain formulations.
Is Sodium Lauryl Sulfate dangerous? Documented risks
SLS is safe at cosmetic use concentrations per the CIR Expert Panel. It is more irritating than SLES to skin and mucous membranes, particularly at concentrations above 2% with prolonged contact; this is why most rinse-off products keep it at 1–2% or opt for SLES. It can disrupt the skin barrier transiently, which is why some people with canker sores or eczema avoid SLS toothpastes and cleansers. It is not carcinogenic, not a hormone disruptor, and is not absorbed systemically in meaningful amounts. It biodegrades rapidly in the environment.
Products that may contain Sodium Lauryl Sulfate
- Suave Professionals Smoothing ShampooSuave
- Pantene Pro-V Classic Clean ShampooPantene
- Pantene Pro-V Repair & Protect ShampooPantene
- Head & Shoulders Classic Clean ShampooHead & Shoulders
- Head & Shoulders Itchy Scalp Care ShampooHead & Shoulders
- Herbal Essences Bio:Renew Argan Oil ShampooHerbal Essences
- Herbal Essences Hello Hydration Moisturizing ShampooHerbal Essences
- Suave Naturals Coconut ShampooSuave
How to avoid Sodium Lauryl Sulfate: safer alternatives
For those with sensitivity, cocamidopropyl betaine, sodium cocoyl isethionate, or decyl glucoside provide milder cleansing with similar foam.
Frequently asked questions about Sodium Lauryl Sulfate
Is SLS harmful to skin?
SLS can cause temporary irritation and barrier disruption in sensitive individuals, especially at higher concentrations or with prolonged exposure. In rinse-off products at normal use levels, it is generally safe.
Does SLS cause mouth ulcers?
Some small studies suggest SLS-containing toothpastes may worsen recurrent aphthous ulcers (canker sores) in susceptible people. Switching to SLS-free toothpaste may reduce frequency in those individuals.
Is SLS a carcinogen?
No. SLS has not been classified as carcinogenic by any regulatory authority including the FDA, EU SCCS, or IARC.
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Sources
- Final Safety Assessment of Sodium Lauryl Sulfate — Cosmetic Ingredient Review
- EWG Skin Deep: Sodium Lauryl Sulfate — Environmental Working Group
- Canker sores and SLS-free toothpaste: A clinical review — PubMed/NCBI
Our scores are never influenced by brands. Last updated 6/11/2026.