La
Lauryl Betaine
Lauryl Betaine
A cleanser that lifts away oil and dirt and builds foam.
What it does
Its fatty part is a lauryl chain, the same chain as in lauric acid. It’s there to clean, not to change your skin.
The EU’s ingredient database lists it as a cleanser (helps keep skin clean).European Commission, CosIng (© European Union, CC BY 4.0) · uses put in plain words by Drop ↗
The evidence, graded
expert consensusUS safety reviewers (2018) judged 11 alkyl betaines, lauryl betaine among them, safe as used in products made not to irritate. In people, it didn’t irritate skin at 0.1% but did at 1% and 10%, and at 0.1% it caused no allergy. At 10% it irritated rabbit eyes. It’s used at up to 8.8%, in shampoos.Burnett 2018 · International Journal of Toxicology ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
Browse all 809 ingredients — grouped by what they do, each with whatever evidence we can cite.
This page is public so a shared ingredient card always has its sources behind it — and so you can check them without an account.
Want more like this?
Every evidence-based flag cites its source, Drop tells you when your routine is complete, and it helps you simplify — instead of selling you more. The app launches on iOS and Android in October 2026. Rate my routine works today at /rate — no sign-in.