Oh brother! This is just another marketing-scare tactic that has gotten completely out of hand! SLS is the component in shampoo that makes the shampoo bubble and lather. SLS is also found in most toothpastes and mouth washes. SLS will irritate your skin if you leave it on your hair or in your mouth for long periods of time (we're talking an hour or more), but that is all that it is... an irritant. It's also a drying agent so while it makes your hair feel all bubbly, it has properties that will dry your hair out. The FDA has a label on toothpaste warning of the dangers of swallowing toothpaste because of 3 main ingredients: SLS, Fluoride, and Sorbitol. But again, not because your going to die if swallow toothpaste... you just might get a case of diarrhea. So, I ask... are you going to make your family stop using flouride toothpaste? I hope not... or good luck at your next dentist appointment! Bottom line: there is NOT one shred of scientific data that suggests SLS is in any way harmful to your health so breathe easy. You don't want to drink the stuff or get it in your eyes, but it will get your hair or mouth clean without harming your health. BTW, if you are looking for a more high quality product that won't dry your hair out, then choose a salon-quality brand of shampoo... many do not contain SLS or it isn't one of the top ingredients.
Edit: I just read some of the responses you received after my initial post and I just have to clarify. SLS has NOT been banned in other countries. There are many emails circulating around for years that state that, but it is simply not true. One company in the UK did eliminate it from their products, however, when several highly respected oncologists and dermatologists were consulted about the companies decision, many were quoted saying that they understood why it was removed, however the companies decision was less about safety and more about marketing. The American Cancer Society even has an article about the myths surrounding SLS on their website. So again, I ask... who are you going to trust? Hard, scientific data conducted by well-known and respected scientists and medical doctors OR marketing geniuses who want to make more money. Get the facts people before making false claims!