Triclosan can create more potent strains of bacteria, increasing antibacterial and antibiotic resistance. So its use in household products may actually contribute to more illnesses. That’s because triclosan kills most — but not all — of the bacteria it encounters. The germs that survive a triclosan onslaught emerge stronger and harder to kill in the future. With the increasing prevalence of triclosan, common bacteria can become more resistant. And if they infect people, treatment with antibiotics could be more difficult.

