It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
(HealthDay)—Here's a cautionary tale about the value of moderation. A case study reported in the March 21 issue of the New England Journal of Medicine shows how habitually drinking an extreme form of highly concentrated tea over almost 20 years created a hard-to-diagnose case of severe bone damage in a 47-year-old woman.
Fluoride concentrations in UK tea, including the leading supermarket economy labelled products, were determined. Fluoride ranged from 93 to 820 mg/kg in the products and 0.43 to 8.85 mg/L in the infusions. The UK supermarket economy teas contained elevated fluoride, ranging from 3.60 to 7.96 mg/L in a 2 minute brewing infusion, comparable to Chinese brick tea, indicating the use of mature leaves in their manufacture. Considering the dietary reference intake (DRI) of 4 mg/day of fluoride for an adult consuming 1 L of tea, prepared from an economy tea, containing 6.0 mg/L fluoride, 75–120% of the DRI fluoride is available for absorption by the human system in the presence of food, increasing to 150% when fasting. Excess fluoride in the diet can lead to detrimental health effects such as fluorosis of the teeth and skeletal fluorosis and consuming economy branded tea will lead to exposure.
"When we tested the patients' tea brands using a traditional method, we found the fluoride concentrations to be very low, so we wondered if that method was detecting all of the fluoride," Whitford said, noting that the tea plant, Camellia sinensis, creates a quandary when measuring fluoride. Unique among other plants, it accumulates huge concentrations of fluoride and aluminum in its leaves - each mineral ranges from 600 to more than 1,000 milligrams per kilogram of leaves. When the leaves are brewed for tea, some of the minerals leach into the beverage.
Most published studies about black tea traditionally have used a method of measuring fluoride that doesn't account for the amount that combines with aluminum to form insoluble aluminum fluoride, which is not detected by the fluoride electrode. Whitford compared that method with a diffusion method, which breaks the aluminum-fluoride bond so that all fluoride in the tea samples can be extracted and measured.
British researchers say consuming tea is healthier than drinking water not only for hydration but for other benefits. They recommend drinking three or more cups of tea a day, the BBC reports
Originally posted by Hefficide
Tea is my beverage of choice, but being an American - I drink it iced rather than hot. All told I drink about 96 -130 ounces of it each day and have for about 30 years. It seemed the healthier choice when compared to most beverages available ( Carbonated soft drinks, beer, etc ).
Now I am going to have to do some research to see if it might be time to alter my habits - though after thirty years I think the damage is done.
British researchers say consuming tea is healthier than drinking water