An international study with the participation of the University of Basel found no evidence of negative effects of fluoride in drinking water on newborns. Analysis of data from over 11.5 million births in the U.S. found no measurable differences in birth weight, gestation duration, or risk of preterm birth. Fluoride is used worldwide to prevent caries, for example in dental care products, table salt or, in some countries, in drinking water. Drinking water fluoridation in particular is repeatedly criticized because of possible health risks.

Fluoride strengthens tooth enamel, repairs incipient damage and prevents tooth decay. It improves dental health in the population, especially in children from lower-income families. In Switzerland, this has been done mainly through fluoridated table salt since the 1980s. In the USA, fluoride has been gradually added to drinking water since the late 1940s and now reaches more than 60 percent of the population.

The research team evaluated data from over 670 counties in the USA from 1968 to 1988. It compared births before and after the introduction of fluoridation with regions without such measures to rule out regional and temporal differences. Birth weight has served as an established indicator of newborn health, as the exposure of the unborn to fluoride is well known. The results showed no negative effects. The study was published in the journal JAMA Network Open.

Previous studies had suggested some harmful effects, but these often only showed correlations without causal evidence. Other factors could play a role. The current analysis refutes fears about birth weight and premature births. It supports the official recommendations for caries prevention through fluoride.

Original Paper:

Community Water Fluoridation and Birth Outcomes | Health Policy | JAMA Network Open | JAMA Network

Editor: X-Press Journalistenbüro GbR

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