Homehttps://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/Healthhttps://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/FDA offers a new fluoride standard for bottled water, but some say it is still too high
FDA offers a new fluoride standard for bottled water, but some say it is still too high
If completed, the new regulation will reduce the permitted fluoride levels in locally packaged and imported bottled water to 0.7 milligrams per liter, which is a slight decrease from the current standard of 0.8 milligrams per liter authorized by the FDA.
The standard applies only to bottled water with added fluoride. This will not affect the permissible fluoride levels in bottled water, which may contain fluoride from the source water. The FDA proposed rule is consistent with a 2015 recommendation by the US Public Health Service, part of the US Department of Health and Human Resources, which suggests that 0.7 milligrams per liter is the optimum fluoride concentration for community water supply systems add fluoride.
The new rule "is based on findings from the development of optimal fluoride concentrations that balance the benefits of fluoride to prevent caries with their risk of causing dental fluorosis, a condition most commonly characterized by white spots on teeth, "the FDA said in a statement. Dental fluorosis is caused by taking too much fluoride for a long time when adult teeth are formed under the gums.
But some scientists worry far beyond fluorosis. It is recommended that the maximum fluoride concentration in bottled water is maintained at a lower level of 0.7 mg / L, writes Dr. Philip Grantzan, Professor of Environmental Health at Harvard T. Chan School of Public Health
. Christopher Nyratt, research director of the American Environmental Research Project, which is linked to the Flouride Action Network, said that "there is currently a rapidly growing research showing fluoride neurotoxicity," with research , showing a direct link. between the IQ between children and the level of fluoride exposure in the uterus: "This is our greatest concern." Behavioral and Cognitive Impact on Health
9] 659006] Morteza Bashash, an assistant at Dala Lana's Public Health School at the University of Toronto, found higher levels of fluoride measured in urine samples of pregnant women associated with the lower IQ and the increased risk of ADHD among children in Mexico.
In particular, Basash has found a decrease in childhood intelligence tests for any increase in fluoride exposure of 0.5 milligrams per liter over 0.8 milligrams per liter found in the urine of the pregnant mother. It is unclear whether this is a study applicable to the US population, he told CNN.
In Mexico, fluoride reducing the cavity by adding it to salt rather than to water (because many people avoid drinking water from the tap). However, the results of his studies are "based on true measurement of body-absorbed fluoride." A Canadian study (link) presented at a conference last year and studies conducted in China showed IQ losses associated with similar levels of fluoride. Due to similar sources of fluoride, regulations and diet, Canadian urine levels are probably similar to US urine levels, Bashaş said.
Neurath believes that both the results of the Mexican and Canadian research will be applied to the United States, as "fluoride in the urine is the best measure for the total fluoride intake." Canadian data from the past 15 years show that women living in cities with fluorinated water supplies had "almost double" levels of urine fluoride concentration as women living in non-fluorinated cities. "Fluoride for drinking water is the main source of fluoride for these women," he said. The effect of prenatal exposure to fluoride on IQ is "very large," said Neurath. "And on the basis of the population this is very important. The proposed rule may not be adequate
Neurath has published a study of dental fluorosis this year, based on data from the National Health and Nutrition Survey, which found a "dramatic increase in fluorosis" compared to the results a decade ago. (The study, though published in a review journal, is a co-author of a lawyer representing the fluoride network for action in legal action on the regulation of fluorinated chemicals by the US Environmental Protection Agency.)
] More than 30% of adolescents in the study showed moderate to severe dental fluorosis (another 35% of the children show less signs of the condition), "a huge increase" compared to a study conducted about a decade ago, said Nyrat. He believes the proposed standard is unlikely to reduce dental fluorosis to acceptable levels.
But he has more concern. "Tooth fluorescence is a visible sign of fluoride overexposure, but there are other invisible signs and adverse health effects that are far more serious," Neurat said based on the work of Bashaş and Granja. National Institute of Environmental Health Sciences. "Our review of studies by China and our own field research is consistent with a recent American study conducted in Mexico that increased exposure to fluoride during pregnancy is associated with brain developmental toxicity to the toothpaste, to ensure that the enamel surface of the teeth is properly protected from caries, there is no need to supplement fluoride intake from food, "he said. ” data-src-mini=”//cdn.cnn.com/cnnnext/dam/assets/120708013125-heat-wave-water-fountain-hp-video.jpg” data-src-xsmall=”//cdn.cnn.com/cnnnext/dam/assets/120708013125-heat-wave-water-fountain-story-body.jpg” data-src-small=”http://cdn.cnn.com/cnnnext/dam/assets/120708013125-heat-wave-water-fountain-story-top.jpg” data-src-medium=”//cdn.cnn.com/cnnnext/dam/assets/120708013125-heat-wave-water-fountain-horizontal-large-gallery.jpg” data-src-large=”//cdn.cnn.com/cnnnext/dam/assets/120708013125-heat-wave-water-fountain-horizontal-large-gallery.jpg” data-src-full16x9=”//cdn.cnn.com/cnnnext/dam/assets/120708013125-heat-wave-water-fountain-horizontal-large-gallery.jpg” data-src-mini1x1=”//cdn.cnn.com/cnnnext/dam/assets/120708013125-heat-wave-water-fountain-topics.jpg” data-demand-load=”not-loaded” data-eq-pts=”mini: 0, xsmall: 221, small: 308, medium: 461, large: 781″ src=”data:image/gif;base64,R0lGODlhEAAJAJEAAAAAAP///////wAAACH5BAEAAAIALAAAAAAQAAkAAAIKlI+py+0Po5yUFQA7″/>