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What’s Wrong with Sodium Lauryl & Sodium Laureth Sulfate?

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Shampoo or soapThis is Gimme the Good Stuff’s simple primer on sodium lauryl sulfate and its nefarious cousin, sodium laureth sulfate

Sodium lauryl sulfate, or SLS, is a surfactant (for simplicity’s sake, think of a surfactant as something that creates bubbles in dish soap, toothpaste, shampoo, shower gel, etc.). There is conflicting evidence, but my research has made me believe that SLS is not a carcinogen, but it is irritating to some people’s skin. SLS sometimes appears on labels as “coconut-derived surfactant.”

Sodium laureth sulfate, or SLES, is another widely-used surfactant (also coconut-based), and is probably carcinogenic, as it is usually contaminated with 1,4-dioxane (this happens during its production).

A 2008 study by the Organic Consumers Association showed that many eco-friendly dish soaps contained 1,4-dioxane, which is a byproduct of the production of SLES. Most of these companies no longer use SLES, but Ecover is a notable exception.  Some products containing SLS are manufactured on equipment used to produce SLES, resulting in 1,4-dioxane cross-contamination if the equipment is not cleaned properly. Seventh Generation claims that their dish soap no longer contains detectable levels of 1,4-dioxane, despite their use of SLS and initial cross-contamination problems.

Bottom line: I’m never okay with using products that contain SLES, but I’m basically cool with SLS if I can’t find an alternative product without it.

Of course, none of the products in our online store contain SLES. I use products with SLS in my home, and recommend them as well. I do NOT recommend skin care products with SLS because of its potential as an irritant, but it is safe in things like laundry or dish soap. (If you hand wash a lot of dishes and find that your hands are irritated, this might be something to consider.)

Stay sane,

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8 responses to “What’s Wrong with Sodium Lauryl & Sodium Laureth Sulfate?”

  1. Sorry but SLS despite not being a proven carcinogen has been studied to cause several health issues so I don’t understand how you can advocate its use in dish soap and laundry detergent but not in skin care products?

    Its okay on your dishes and in your clothes? P.S. Being derived from coconut makes no difference, in terms of chemistry the end product has the same chemical composition.

  2. How do u feel about the product Shea moisture baby head to toe? It clams to be organic but saw a specious ingredient sodium lauroyl lactylate (coconut oil)

  3. could you please email me back and let me know what you believe to be true about an air freshener called citrus magic if it is non toxic and ok to use thank you

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