Triclosan Caution

antibacterial Antibacterial soaps (sometimes called antimicrobial or antiseptic soaps) contain certain chemical ingredients that plain soaps do not. These ingredients are added to many consumer products in an effort to reduce or prevent bacterial contamination.

  A large number of liquid soaps labeled "antibacterial" contain triclosan, an ingredient of concern to many environmental and industry groups. Animal studies have shown that triclosan may alter the way hormones work in the body. While data showing effects in animals don't always predict effects in humans, these studies are of concern to FDA as well, and warrant further investigation to better understand how they might affect humans.

  In addition, laboratory studies have raised the possibility that triclosan contributes to making bacteria resistant to antibiotics. Such resistance can have a significant impact on the effectiveness of medical treatments.

  Moreover, recent data suggest that exposure to these active ingredients is higher than previously thought, raising concerns about the potential risks associated with their use regularly and over time.

Source: http://www.fda.gov/ForConsumers/ConsumerUpdates/ucm378393.htm