I posted during the summer about making sun tea, which I've continued to do almost daily. However, after reading the following information about tea in Anticancer—A New Way of Life, I'm revising the plan. The author, Dr. David Servan-Schreiber, discusses the anti-cancer properties of lots of foods, including tea, which has many. I'll continue to consume decaffeinated green tea, but will make it a different way.
Here are some notes from his section on tea as a cancer-fighter:
•Rich in polyphenols, including catechins, which reduce the growth of the new vessels needed for tumor growth and metasteses.
•Powerful antioxidant and detoxifier.
•Facilitates the death of cancer cells by apoptosis (death by suicide; programmed into every cell to prevent "anarchy" and uncontrolled duplication)
As to tea itself -- kinds and preparation:
•Black tea is fermented, a process that destroyes a large proportion of its polyphenols. Oolong tea is midway between black and green in terms of retaining polyphenols. Decaffeinated (as well as regular) green tea retains the highest amounts of polyphenols.
•Japanese green tea (sencha, gyokuro, matcha, etc.) is richer in EGCG (powerful catechin) than common Chinese green tea.
•Green tea must be steeped for at least five to eight minutes -- ideally ten minutes -- to release its catechins.
•Steeped green tea should be drunk within the hour. Do not store green tea after steeping as it loses its beneficial polyphenols after 1-2 hours.
It's this last point that is the bummer re: sun tea. It sits in the sun for "eight" hours, then in the refrigerator for a day or two -- quite longer than the ideal one-hour consumption time. The author doesn't comment on green sun tea and its polyphenol retention rate, but I've decided to err on the side of caution at this point and switch to steeped green tea. Sun tea in the summer is still great as a refreshing drink, with its lower levels of (bitter) tannic acid. But as a cancer fighter, it may not be as good.
Anybody read anything different -- especially re: sun tea? I'd like to know if you have. (By the way, I don't have cancer, except for the myriad cancer cells that are floating in all our bodies waiting to be destroyed by our immune system, but if I'm going to drink green tea I'd rather drink it the cancer-fighting way.)
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