Drinking tea is both good and bad for you. How can that be? Regular tea boosts the immune system (unlike coffee), but herbal tea contains acids that eat away tooth enamel.

Regular tea contains chemicals called alkylamine antigens, which are also present in some bacteria, cancer cells, parasites and fungi. When the body is exposed to them through tea drinking, it can build up a defense against them and will be more able to fight them off. Green and black teas contain the antigens, but coffee does not.
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Get out that tea pot and those dainty porcelain cups because scientists have declared that tea is good for your health. Drinking several cups of tea a day can help prevent heart attacks, protect bone density and guard against osteoporosis and help prevent cancer as well.

Dr. Kenneth Mukamal of Harvard University has found that drinking tea may reduce the risk of death after a heart attack. He studied 1,900 American heart attack patients and found that those who drank the most tea were the least likely to die in the three or four years after their attack.
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