Hundreds of studies have been conducted on fluoride, fluoridation, and tooth decay. Few topics have been examined more closely. The overwhelming weight of the evidence shows that fluoridated water reduces the rate of tooth decay.
By 1980, fluoride toothpaste had grown to reach 90 percent of the market. Given the widespread use of fluoride toothpaste today, is fluoridated water still necessary? The answer is yes. Consider the solid evidence from research that has been conducted since fluoride toothpaste became widely used. Here is a sample of the many studies showing fluoridated water continues to protect against decay:
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