http://articles.mercola.com/sites/articles/archive/2005/08/06/shower-water.aspxBy Richard Mesquita, AquaMD A new study from the Wake Forest University School of Medicine claims that you risk permanent nervous system (brain) damage if you regularly inhale water vapor, when showering, which contains manganese. What is Manganese? ManganeseenCommunityServer 2008.5 SP1 (Build: 31106.3070)