Sodium Laureth Sulfate
Also known as: SLES, Sodium Lauryl Ether Sulfate
What is Sodium Laureth Sulfate?
An ethoxylated version of sodium lauryl sulfate, a widely used anionic surfactant that creates rich lather and effectively removes oil and dirt.
Why is it used in products?
It's one of the most popular cleansing agents in the world — cheap, effective, and produces the satisfying foam consumers expect from cleansers and shampoos.
Why does it clog pores?
SLES strips the skin of its protective lipid barrier, which triggers a rebound overproduction of sebum that can flood and clog pores. It also irritates the follicular wall, making it more prone to trapping dead cells and forming comedones. The irritation-then-overproduction cycle is especially damaging for acne-prone skin.
Commonly found in
- shampoos
- body washes
- facial cleansers
- toothpaste