Potentially harmful fluoride levels found in some instant teas | The Source | Washington University in St. Louis
Some instant teas may contain excess fluoride.Instant tea, one of the most popular drinks in the U. S., may be a source of harmful levels of fluoride, researchers at the School of Medicine report. The researchers found that some regular strength preparations contain as much as 6.5 parts per million (ppm) of fluoride, well over the 4 ppm maximum allowed in drinking water by the Environmental Protection Agency and 2.4 ppm permitted in bottled water and beverages by the Food and Drug Administration.