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Quick answer: Both score equally on our risk model. Ammonium Laureth Sulfate is allowed in the EU and allowed in the US; Sodium Lauroyl Sarcosinate is allowed in the EU and allowed in the US.
| Property | Ammonium Laureth Sulfate | Sodium Lauroyl Sarcosinate |
|---|---|---|
| EU status | Allowed | Allowed |
| US status | Allowed | Allowed |
| Risk level | low | low |
| Banned in | — | — |
| Restricted in | — | — |
| Category | surfactant | surfactant |
| Where it hides | TRESemmé Moisture Rich Shampoo, Garnier Fructis Fortifying Shampoo, VO5 Herbal Escapes Shampoo | Tom's of Maine Natural Toothpaste, Aveeno Positively Clean Foaming Face Wash, Puracy Natural Body Wash |
Ammonium laureth sulfate is an anionic surfactant very similar in structure to SLES but uses an ammonium counterion instead of sodium. It produces abundant foam and provides excellent conditioning to the hair shaft during washing.
Sodium lauroyl sarcosinate is an anionic surfactant derived from sarcosine (an amino acid derivative) and lauric acid from coconut oil. It is an acyl amino acid surfactant known for mildness and a smooth, silky after-feel.
Ammonium Laureth Sulfate: Ammonium laureth sulfate shares a similar safety profile to SLES. The CIR has concluded it is safe for cosmetic use. Like SLES, it may contain trace 1,4-dioxane from ethoxylation, addressed by standard manufacturing controls. It is not a carcinogen or endocrine disruptor. Mild skin irritation is possible in sensitive individuals at high concentrations but is not a concern at typical use levels in rinse-off products.
Sodium Lauroyl Sarcosinate: Sodium lauroyl sarcosinate is considered safe for cosmetic use by the CIR. It is non-irritating at typical use concentrations and has no known carcinogenic, mutagenic, or endocrine-disrupting properties. It can potentially form N-nitrosamines if formulated with nitrosating agents; good manufacturing practice prevents this. It is one of the preferred alternatives to SLS in dental formulations.
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