Drink a lot and the right kind of water and eliminate too many sweet and overly salted food.

How much fluoride is too much? The amount of fluoride in our drinking water is 1 ppm. And even at 1 ppm, the fluoride has been shown to cause such problems as birth defects, mental retardation, heart and kidney damage, allergies and cancer. Fluoride also decreases the migration rate of white blood cells, which leads to suppression of the immune system.

One report (prepared by the Library of Congress Congressional Research Service for the United States House Subcommittee on the environment and the atmosphere) lists fluoride (along with chlorine, asbestos, nickel and mercury) as a pollutant, dangerous due to its adverse effects on the central nervous system and increased rates of cancer, heart disease, and genetic mutations. According to chemistry indexes, sodium fluoride is more toxic than lead, and only slightly less toxic than arsenic.
To stop drinking regular water that is not purified by reverse osmosis or distilled will cause health problems
Lead is a major offender of the nervous system, causing impairment, especially in children. It is commonly found in very old houses in the plumbing.9 Since lead can leach out quicker in water that it sits in, it�s not a good idea to drink tap water. If you decide to drink from the tap or cook with the water, let the water run until it is very cold, which can take two minutes or more. Even very low levels of lead are very dangerous to children and unborn children.

So, what�s the best kind of water to drink? These kinds, in this order:

1) distilled
2) reverse osmosis
3) filtered water
4) spring water (filtered through carbon)
5) mineral water (filtered through carbon)