I just love the "contact a Poison Control Center if ingested" message on the back of your toothpaste. That's if you ingest 0.15% of a pea-sized amount of toothpaste?
I think it's impossible to avoid fluoride completely but you should definitely make sure that you aren't getting too much. Get a reverse osmosis water purifier if you are worried about getting too much fluoride.
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And some doctors worry that excessive fluoride may actually be promoting tooth decay rather than preventing it—and harming kids in other ways, particularly as they get older. FAN cites studies showing how low-to-moderate doses of fluoride can lead to eczema, reduced thyroid activity, hyperactivity, IQ deficits, premature puberty and even bone cancer.
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http://environment.about.com/od/heal...a/fluoride.htm