
Also Known As:
SLES
Sodium laureth sulfate (SLES) is a detergent widely used in shampoos and other sudsing personal care products. SLES may be irritating to eyes and skin. Otherwise, it is considered for safe. SLES can become contaminated with 1,4-dioxane, which the U.S. Environmental Protection Agency considers to be a probable carcinogen. However, the U.S. Food and Drug Administration encourages manufacturers to strip out this contaminant. A somewhat stronger cousin of sodium laureth sulfate is sodium lauryl sulfate (SLS). The Cosmetic, Toiletry, and Fragrance Association discourages use of sodium lauryl sulfate in products intended for prolonged use, unless in low concentrations. Information has circulated on the Internet and elsewhere that shampoos and other products containing SLS or SLES cause cancer. However, there is no evidence that either ingredient is carcinogenic. Since these ingredients can cause skin and eye irration, it is prudent to discontinue use if these symptoms appear. Irritants may permit the penetration of other, more dangerous chemicals.
U.S. Food and Drug Administration
Center for Food Safety and Applied Nutrition
5600 Fishers Lane
Rockville, MD 20857-0001
888-INFO-FDA (888-463-6332)
Environmental Working Group
1436 U St. N.W., Suite 100
Washington, DC 20009
http://www.ewg.org/reports/skindeep/
National Library of Medicine's Household Products Database
http://householdproducts.nlm.nih.gov
Because We're Worth it! The Campaign for Safe Cosmetics