yes, we do use this particular ingredient, which is derived from coconut oil and used for its lathering and efficacy properties, in a number of our products at minute levels.
there has been some controversy over SLS being carcinogenic. SLS is a safe ingredient and has not been classified as a known, probable or even suspected carcinogen by either the International Agency for Research on Cancer (www.iarc.fr) or the American Cancer Society (www.cancer.org). the ACS has actually gone so far as to issue a statement to this effect.
while the carcinogen concern is completely unfounded, SLS can in fact be a moderate skin and eye irritant when used in high concentrations and unbuffered. method only uses SLS in our formulations at sufficiently low concentrations so that any irritation concern is irrelevant.
when deciding to use Sodium Lauryl Sulfate in some of our formulations, method did a complete assessment of the environmental and health aspects of this ingredient, including tests for toxicity and biodegradability. this was done in cooperation with the EPEA, an independent environmental research institute led by Dr. Michael Braungart, author of the landmark text Cradle to Cradle. their findings showed SLS to be altogether safe in its intended usage, non-toxic, non-carcinogenic and environmentally preferable.