Many people believe that the water coming out of our taps is safe. This may not be true. Whether it’s contaminants from the reservoir or the pipes or the addition of disinfection byproducts (DBPs) used by the local governments, most tap water contains things that are bad for the biology of our cells. DBPs can be endocrine disruptors. An additional concern is the concentration of fluoride in tap water, which is of particular concern to the thyroid hormone system. Too much fluoride can be toxic to the body and its cells. There is a huge benefit to drinking some form of filtered water.