Rumors have been flying around the Internet over the years about the harm Sodium Lauryl Sulfate can cause to people who use them in shampoo, toothpaste and other beauty products. Snopes, the authority on Internet rumors say the claim Sodium Lauryl Sulfate cause cancer is false.
For the whole article go to www.snopes.com/inboxer/household/shampoo.asp
Synergy products contain Sodium Laureth Sulfate, a different chemical.