More data on triclosan, the chemical that makes soap "antibacterial," from the Los Angeles Times health blog.  A research team from UC Davis found untoward effects of the chemical in mice.  Animal evidence is not usually enough to change regulations on a chemical.  But in this case, writer Eryn Brown reminds us, adding the chemical to soap doesn't improve soap's effectiveness.  Hand washing with regular soap and water is a perfectly good germ-killing method.