Abstract
It has long been accepted that fluoride accumulates in the leaves of the tea plant. Camellia sinensis. In addition it is known that some of this fluoride is released into the infusion which is drunk as tea. The exact concentration of fluoride in a cup of tea and the effects of this fluoride have been the subject of many international studies. This review summarizes the main points of such studies which have been carried out in an attempt to establish the dental significance of fluoride in tea. The most popular teas in Ireland are not readily available in any other country and therefore, Irish data may not be assumed to be similar to those in the studies reviewed here. By identifying potential sources of high fluoride ingestion, recommendations can be made to reduce consumption from these sources in patients who may be at risk of dental fluorosis. In conclusion, it is recommended that a research project be carried out to analyse the fluoride levels released and the rates of the releases from teas available on the Irish market. Ireland has the highest per capita consumption of tea in the world.
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Tealeaves may release or absorb fluoride, depending on the fluoride content of water.
As the tea plant (Camellia sinensis) is known to accumulate fluoride from the soil, the tealeaves may contain high concentrations of fluoride, which is easily released during infusion. In this study, we have tested the possible effect of original fluoride concentration in the water on the fluoride release from tea.
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Mitigation of sodium fluoride induced toxicity in mice brain by black tea infusion.
SUMMARY: In an extension of previous work on fluoride (F) toxicity in a group of 80 Swiss albino mice, the mitigating effects of polyphenols in black tea on the F-induced increase in glycogen, cholesterol, and total lipids in the cerebral hemisphere (CH), cerebellum (CB), and medulla oblongata (MO) regions of
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Fluoride content in caffeinated, decaffeinated and herbal teas
The fluoride contents of infusions prepared from 44 different brands and types of teas were measured. Fluoride concentrations ranged from 0.34 to 3.71 ppm (mean = 1.50 ppm) in caffeinated tea infusions, 0.02-0.14 ppm (mean = 0.05 ppm) in herbal tea infusions, and 1.01-5.20 ppm (mean = 3.19) in decaffeinated tea infusions. This is
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Flavor augmentations affect fluoride bioavailability from brewed dark tea.
Highlights The bioavailability of fluoride in dark tea and NaF aqueous solution was evaluated. Milk significantly reduced the bioavailability of fluoride in dark tea. In rats, butter prolonged the absorption period of fluoride from dark tea. Fluorosis caused by consumption of dark tea is a major public health problem in the
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Effect of excessive green tea versus fluoride and caffeine on body weight and serum thyroid hormones in male mice
Green tea is a worldwide used beverage rich in fluoride and caffeine. To study the effect of excessive green tea intake versus fluoride and caffeine on body weight and serum thyroid hormones in male mice. Also, to confirm the effect of excessive green tea intake on thyroid gland was due
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Fluoride Content of Tea
Tea, particularly tea drinks made with lower quality older leaves, contain high levels of fluoride. Because of these high levels, research has found that individuals who drink large amounts of tea can develop skeletal fluorosis -- a painful bone disease caused by excessive fluoride intake. Since skeletal fluorosis is often misdiagnosed by
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Estimated "Threshold" Doses for Skeletal Fluorosis
For over 40 years health authorities stated that in order to develop crippling skeletal fluorosis, one would need to ingest between 20 and 80 mg of fluoride per day for at least 10 or 20 years. This belief, however, which played an instrumental role in shaping current fluoride policies, is now acknowledged by the National Academy of Sciences (NAS) and other US health authorities to be incorrect.
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Tea Intake Is a Risk Factor for Skeletal Fluorosis
A number of recent studies have found that heavy tea drinkers can develop skeletal fluorosis - a bone disease caused by excessive intake of fluoride.
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Fluoride content in tea and its relationship with tea quality.
J Agric Food Chem. 2004 Jul 14;52(14):4472-6. Fluoride content in tea and its relationship with tea quality. Lu Y, Guo WF, Yang XQ. Department of Tea Science, Zhejiang University, 268 Kaixuan Road, Hangzhou 310027, People's Republic of China. Abstract: The tea plant is known as a fluorine accumulator. Fluoride (F) content in fresh leaves collected
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Exposure Pathways Linked to Skeletal Fluorosis
Excessive fluoride exposure from any source -- and from all sources combined -- can cause skeletal fluorosis. Some exposure pathways , however, have been specifically identified as placing individuals at risk of skeletal fluorosis. These exposure pathways include: Fluoridated Water for Kidney Patients Excessive Tea Consumption High-Fluoride Well Water Industrial Fluoride Exposure Fluorinated Pharmaceuticals (Voriconazole
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