Science, Space and Technology News 2023
A study of 74 children in rural Ethiopian villages with a wide range of naturally occurring fluoride in drinking water found that children exposed to excess fluoride performed worse on cognition tests.
The study found that higher exposure to fluoride in drinking water was linked to more errors on the drawing and memory tests. Lead author Tewodros Godebo, assistant professor of environmental health sciences at Tulane University School of Public Health and Tropical Medicine, said the “causal relationship between fluoride exposure and neurotoxicity remains unclear” but he hopes these preliminary findings will spur more research into the potential cognitive impacts of fluoride exposure.
Fluoride is essential for preventing tooth decay. However, excess intake of fluoride has been linked to lower IQs in past epidemiological studies in rural communities in China and India. According to the US CDC, the Public Health Service recommendation for community water flurodation is 0.7 milligrams per liter, as this is the optimal level of fluoride in drinking water to provide enough fluoride to prevent tooth decay in children and adults while limiting the risk of dental fluorosis.Over 200 million people worldwide are estimated to be exposed to high fluoride levels in their drinking water.
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