But some scientists are increasingly concerned that a common anti-bacterial ingredient called triclosan may harm people's health. Laboratory studies have found that it may disrupt hormones, interfere with muscle function and promote the growth of stronger bacteria — and other research suggests it is building up in the environment to the possible peril of wildlife.
What's more, there is no evidence that hand-washing with soap containing triclosan or other anti-microbial ingredients offers any health advantages over regular soap and water, according to advisory committees for the American Medical Association and the U.S. Food and Drug Administration."