Tea contains fluoride - substances that in moderation can be good for teeth and strengthen bones. But if fluoride is much more than the body needs, with healthy teeth, you can say good-bye, and tea bags as American researchers have found out, the concentration of fluorine dangerously high.
The overabundance of fluorine provoke dental fluorosis. In this disease, deteriorating dental enamel bright spots first appear, and then dark, depending on the level of fluorine. In some cases, the teeth begin to crumble. Furthermore, deteriorate the bones, they may become brittle. Disrupts the function of the thyroid and parathyroid glands, the liver.
Scientists from the Medical College at Washington University in St. Louis found that in packaged tea attended by the usual castle 6, 5 parts of fluoride per million, which significantly exceeds the allowable concentration. The fluoride content of different varieties of tea ranged from 1 to 6, 5 ppm. According to one of the authors of the study Professor Michael White, the tea leaves to accumulate fluoride can actually coming from the soil and water. But researchers still have to figure out how to link the ability to collect tea fluoride and its variety, and also the year of his collection.
FOR REFERENCE: Maximum allowable concentration of fluoride in drinking water is 4 parts per million. Bottled mineral water should not contain more than 2, 4 parts per million of fluoride. (READ MORE)
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