Fluoride is the single most effective means to prevent dental cavities in both children and adults. We can get fluoride from many sources, including foods and beverages, professional fluoride applications at the dentist, toothpaste, and drinking water. The fluoride content in bottled water or beverages mirror the level of fluoride in the water at the place of manufacture and can range from 0.01 ppm to over 5 ppm. Since the FDA has not defined a nutrient content claim for fluoride, bottled water manufactures are not required to list fluoride content on their labels. It is only listed if fluoride is added during processing.