Sodium Lauroyl Methyl Isethionate: what it is in skincare

A very mild cleansing agent that helps cleanse skin gently while keeping a soft, cushiony foam.

What it does

Function: surfactant (mild). Surfactants lift away oil, sunscreen and grime. K-beauty favours mild amino-acid and amphoteric surfactants that clean without stripping.

How to spot it on a label

On a Korean product's INCI list, look for Sodium Lauroyl Methyl Isethionate. Ingredients are listed high-to-low by amount, so its position hints at how much is in the formula. See all cleansing agents (surfactants) →

✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed 2026-06-21.

General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.