Disodium Lauryl Sulfosuccinate

Surfactants are partly water-soluble and partly oil-soluble, which allows the oil and water-based ingredients of a formula to blend well, but also to be rinsed well.

DLS is often used in cosmetics as a milder alternative to sulfates, although one doesn’t systematically replace the other as they are not the same material and will not behave in the same way with other ingredients. It is derived from palm oil, which is why Lush try not to overuse it and find other options when possible.