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You can find SLES in toothpastes, shower gels, bubble bath, soaps, facial cleansers, and detergents. It's an inexpensive ingredient, so manufacturers like to use it to keep costs down. SLES can cause eye irritation and can be contaminated with the carcinogen 1-4 dioxane and ethylene oxide, which is a carcinogen, along with being a reproductive/development toxicant, and immunotoxicant.
While SLES is thought to be milder than Sodium Lauryl Sulfate (SLS), there are still concerns.