I love green tea!
There is a concern regarding Green Tea grown in areas with chemical run-off and flouride from households running into the soil. Tea plants do pick up the toxins and flouride from this run-off contamination and the flouride remains in the plant.
This is why some health articles in main-stream media magazines highlight green tea as good for your teeth- because of flouride it contains. It is not natural flouride, but synthetic flouride from all the toothpastes, etc, that end up in the soil.
I've found that there are some sources of green tea you can get that are grown in uncontaminated areas. One of them - so far-- that seems to be uncontaminated from flouride is Haiku Sencha green tea. You can get it for about $4.99 or less in healthfood stores or online. The local healthfood store I have in my area happens to sell it. It comes in a green crdboard box and is USDA organic and non GMO
Here is what they say in side their carton- and why I will buy it from now on instead of Lipton or some other big name brand sold in grocery stores:
"Japanese green tea is considered by many connoisseurs to be the finest in the World, and the best Japanese tea has traditionally been produced in the Uji River Valley along the old raod between the ancient capitals of Nara and Kyoto. Hidden high up in the valley, far from the main road, lies the remote, centuries-old tea plantation of the Nagata family. The Nagats follow the principles of an agriculteral technique known in Japan as nature farming, rejecting animal manure as well as chemical fertilizers, herbicides and pesticides. They apply only vegetable-quality compost to replenish the nutrients in their topsoil, while building soil vitality by maintaining a semi-wild natural environment. Weeding is kept to a minimum and the tea bushes are largely left to fend for themselves. Ther are no straight rows of uniform tightly trimmed tea plants here, as the Nagatas prune only occasionally., allowing each bush to grow according to its own individual energy pattern.
Although chemically treated plants burn themselves out in twenty years, Nagata plants commonly produce for forty years, sometimes as long as 100 years."
So if you are afraid of flouride in your green tea- I recommend skipping the typical green teas sold in main-stream grocery stores by publicly traded big corporations- and go with something comparible to Haiku -which is easily obtainable in many health food stores or online stores and also inexpensive.
Also- with green tea, folks shouldnt' worry too much about caffiene. I read once that the natural caffiene amounts in green tea are in such a balance that they are metabolized a certain way in which the body and adrenal glands are not affected as negatively as they would be with too much coffee , cola or black tea.
P.S. when you brew green tea- don't steep the tea in boiling water- wait a bit , because high temps of heat destroy many of the anti-oxidants in it.