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Health researchers are questioning whether Americans, particularly children, may have too much fluoride in their diets.
Health researchers are questioning whether Americans, particularly children, may have too much fluoride in their diets. The U.S. Centers for Disease Control and Prevention just completed a study, to be published early next year, showing that children are exposed to fluoride from a variety of sources, including drinking water, toothpaste, fluoride supplements and even grape juice.
"There probably is excess exposure," says Kit Shaddix, fluoride team leader at the CDC's division of oral health. For years, groups have opposed the fluoridation of public water systems, blaming fluoride for ailments ranging from allergies to cancer. Fluoride does occur naturally in many foods, including tea.
The CDC says the biggest problem is an apparent increase in dental fluorosis, an unsightly and permanent discoloration of teeth. Fluorosis is caused by overexposure to fluoride at a time when teeth are just forming, often leaving them stained brown with white spots.
Only children under six years old are vulnerable. A recent national study found that 22% of U.S. children have some form of fluorosis. Bleaching can't fix it. Dentists often use expensive veneers to cover it in a "goodwill" payment of 1,000 pounds (about $1,600) after a child developed a severe case of fluorosis. And, well-meaning parents often put a large glob of toothpaste on their children's toothbrush.
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