Excessive levels of fluoride found in budget supermarket teas
A new study claims that people who drink 4 daily cups of economical supermarket teas may be exposed to high concentrations of fluoride and an increased risk of skeletal and dental illnesses. Researchers from the UK compared fluoride levels of black teas from major local supermarkets, branded black teas and branded green teas, as well as Oolong and Pu Erh blends. Budget black tea blends showed the highest concentration of fluoride: around six milligrams per liter or 75-120% of the recommended daily intake. Oolong and Pu'er teas had the lowest concentrations of fluoride: 10-16% of the daily reference intake. The results are down to the fact that mature tealeaves, containing higher amounts of fluoride, are more frequently used in cheaper blends, whereas younger leaves and buds are used for higher grade and specialty tea products.