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Study: Fluoridation Benefits Doubtful
Date:1/9/2009

NEW YORK, Jan. 9 /PRNewswire-USNewswire/ -- Achieving cavity-free status has little to do with fluoride intake, reports a study in the Fall 2008 Journal of Public Health Dentistry.

The ongoing Iowa Fluoride Study (IFS), begun in 1992, follows a cohort of children from birth. Researchers measure fluoride use and ingestion, count cavities and document fluorosis - white spotted, yellow and/or brown stained teeth - the outward sign of fluoride over-ingestion.

IFS researchers report, "The benefits of fluoride are mostly topical...while fluorosis is clearly more dependent on fluoride intake."

They explain that when fluoridation began in the 1940's, "it was believed that fluoride needed to be ingested early in life to provide [cavity] prevention...Today, evidence suggests that...the benefits of fluoride are mostly topical."

Fluoride chemicals are added to 70% of public water supplies at so-called "optimal" levels (0.7 parts per million - 1.2 ppm), once believed to prevent cavities.

The IFS researchers find that "firmly recommending an 'optimal' fluoride intake is problematic." They agree with fluoride researchers Burt and Eklund that the term "optimal fluoride intake" be dropped from common usage.

Quantifying fluoride intake is more complex than it was several decades ago because of the widespread use of fluoridated dental products and increased fluoride content of foods, they report.

"Thus, it is doubtful that parents or clinicians could adequately track children's fluoride intake and compare it with the recommended level, rendering the concept of an "optimal" or target intake relatively moot," they write.

In 2003, IFS researchers wrote, "There is no specific nutritional requirement for fluoride." They described the fluoride content of some foods. For example:

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SOURCE NYS Coalition Opposed to Fluoridation, Inc.
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