The study conducted by the University of Derby and
the former Health Protection Agency compared the fluoride levels of economy
black tea blends from some supermarkets in the United Kingdom with that in
branded tea blends. The fluoride levels were estimated in the dry tea as well
as in tea infusions brewed in boiling water for two minutes.
found that economy range-tea bags contain an average of six mg per liter of
The US National Academy of Sciences on the other hand recommends a maximum of 4
mg per day of fluoride. Branded tea blends were found to contain an average of
3.3 mg per liter, whereas very pure blends had an average of 0.7 mg per liter.
Tea Fluoride Content
According to the researchers, the tea plant tends to
accumulate fluoride from the soil. The economy teas are often made from mature
tea leaves, which have high fluoride content. The branded teas, on the other
hand, are made from the newer leaves and buds, which have less fluoride
Teeth and Bones
Fluoride is known as a double-edged sword. While
some amount of fluoride is necessary for the proper development of bone and
prevention of tooth decay, high levels result in a condition called fluorosis
This condition stains teeth initially, and later results in mottling of teeth
enamel. The patient also complains of pain in bones and joints, and is at an
increased risk of suffering from fractures.
The risk of complications due to the high fluoride
content of tea is mainly to those people who drink four or more cups of tea
. The high fluoride content could also be important in those places
where people commonly suffer from fluorosis, due to high content of fluoride in
drinking water. The researchers feel that it would help if the tea
manufacturers also mention the fluoride content on their products.
results of the study do not imply that one has to drink only the costliest
brands of tea. If you would prefer to go in for the economy brand, all that you
would have to do is limit your tea intake.