Anyone who has worked with me knows that much of what my work is based on has to do with the various types of chemicals, foods, and medicines that our bodies are coming into contact with. Some of this we have a lot of control over, while other things we have very little control over or may be completely unaware of. Flouride is an example of that. This is very interesting information about this subject and one reason why there is a difference between filtered tap water and bottled spring water. http://articles.mercola.com/sites/articles/archive/2011/11/12/jeff-green-on-fluoride-part-1.aspx?e_cid=20111112_DNL_art_1