Does not contain laurel/laureth sulfates. Huh. What's that? Is that a bad thing? Who knew? Am I the only one that didn't know? It's what allows the liquid, shampoo, soap, to foam. Check this out!
Sodium laureth sulfate has been shown to increase the frequency of canker sores among people with frequent recurring sores. People with recurrent canker sores are thus recommended to avoid use of toothpastes containing sodium laureth sulfate. While SLS is a known irritant, evidence and research suggest that SLES can also cause irritation after extended exposure in some people.
Toxicology research by the OSHA, NTP, and IARC have confirmed the Cosmetic, Toiletry, and Fragrance Association (CTFA) and the American Cancer Society disputation that SLES is a carcinogen. SLES and SLS, and subsequently the products containing them, have been found to contain parts-per-thousand to parts-per-million levels of the known carcinogen 1,4-dioxane, with the recommendation that these levels be monitored. The U.S. Environmental Protection Agency considers 1,4-dioxane to be a probable human carcinogen (having observed an increased incidence of cancer in controlled animal studies, but not in epidemiological studies of workers using the compound), and a known irritant (with a no-observed-adverse-effects level of 400 milligrams per cubic meter). The U.S. Food and Drug Administration encourages manufacturers to remove 1,4-dioxane, although it is not required by federal law.
Recent research into the effects of SLS on male hair folicle growth has shown that excessive use of sodium laureth sulfate in shampoos can lead to permanent baldness. It has been recommended by the International Research Institute for Male Pattern Baldness that you check whether or not any shampoo, conditioner, shower gel, or other hair products you use contain SLS as the use of these products may result in hair loss in men.
Ah jeez! One more thing to worry about!