Re: flouride in tea, from Oregon State University's Linus Pauling Institute:
Fluoride
Tea plants accumulate fluoride in their leaves. In general, the oldest tea leaves contain the most fluoride (9). Most high quality teas are made from the bud or the first two to four leavesthe youngest leaves on the plant. Brick tea, a lower quality tea, is made from the oldest tea leaves and is often very high in fluoride. Symptoms of fluoride excess (i.e., dental and skeletal fluorosis) have been observed in Tibetan children and adults who consume large amounts of brick tea (10, 11). Unlike brick tea, fluoride levels in green, oolong, and black teas are generally comparable to those recommended for the prevention of dental caries (cavities). Thus, daily consumption of up to one liter of green, oolong, or black tea would be unlikely to result in fluoride intakes higher than those recommended for dental health (12, 13). The fluoride content of white tea is likely to be less than other teas, since white teas are made from the buds and youngest leaves of the tea plant. The fluoride contents of 17 brands of green, oolong, and black teas is presented in the table below (12). These values do not include the fluoride content of the water used to make the tea. For more information, see the separate article on Fluoride.
Fluoride Content of Teas (12)
Type of Tea / Fluoride (mg/liter)* / Fluoride (mg/8 ounces)
Green 1.2-1.7 0.3-0.4
Oolong 0.6-1.0 0.1-0.2
Black 1.0-1.9 0.2-0.5
Brick tea 2.2-7.3 0.5-1.7
*Fluoride in 1% weight/volume tea prepared by continuous infusion from 5 to 360 minutes
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Very few Americans are ever exposed to brick tea; it's a very cheap grade that is mostly only sold in Asia. Buy the good stuff and you really don't have to worry about excess flouride content unless you have some kind of odd sensitivity to it.
I make very good tea, but I don't drink it in any form. One of my chores as a child was to bleach the tea stains out of the china, so I associate tea with bleach; can't stomach it AT ALL. From her childhood, my mother drank hot tea in the same way that a chain smoker goes through cigarettes. The kettle was boiling 24/7, and her cup was never empty. Dad discovered iced tea after coming to the US; I remember that I always had to have 3 gallons ready for him on days when he was scheduled to mow our 1/2 acre lawn in S. Louisiana. He did it with a push mower, and it was always a 3-gallon job.