A new comprehensive review of the data suggests the 'benefits of fluoridating water have declined in recent decades.'
The benefits of putting fluoride in our drinking water might have weakened over time. In a new review of the evidence, scientists have found that while water fluoridation may still slightly reduce the risk of cavities in young children, its overall impact is likely smaller than it was 50 years ago, before fluoride was widely available in toothpaste.
The newer studies in the review were conducted in high-income countries, the researchers note. People in many parts of the world still have very high rates of tooth decay and limited access to fluoride toothpaste or other preventive treatments. So new water fluoridation programs in these areas would likely still have a larger positive effect on residents’ tooth health.
A previous Cochrane review found that these programs can likely raise the risk of dental fluorosis in young kids—a condition caused by too much exposure to fluoride that can cause discoloration of the teeth. Some recent studies have also found a potential link between fluoride exposure andin teens, as well as evidence that increased fluoride exposure in the womb is tied to a higher risk of children developingby age 3.
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