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Cancer Fighting Benefits of Green Tea

        In the past ten years the cancer-fighting benefits of green tea have been extensively studied. The evidence has been so positive that the National Cancer Institute plans to conduct human trials. Currently, tea compounds are being developed for trial use as cancer-preventive agents. (1)

        It’s very possible new cancer treatments will result from those trials. Meanwhile, nothing could be easier than adding green tea to your diet. Let’s take a look at some interesting green tea health benefits…

        To start with, cancer rates are lower in countries where green tea is regularly consumed. (2) Green tea is especially rich in flavonoids – about 30% by dry weight. This includes an active group of compounds called catechins, which give green tea its cancer-fighting power. (3, 4)

         And the fascinating thing is, the antioxidant compounds in green tea work against cancer in several different ways…

A Cancer Terminator…

        At the genetic level, the benefits of green tea occur when it causes cancer cells to starve themselves.

        By nature, cancer cells have an endless appetite and are constantly trying to divide and spread. They do this by developing their own blood vessels that feed them. Green tea has been shown to inhibit that process. (5)

        The catechin known as ECGC, which is five times higher in green tea than black tea, blocks an enzyme that cancer cells need to grow. Which means it works exactly like anti-cancer drugs that are formulated to do the very same thing. (6)

        At the same time, other catechins in green tea attack the cancer cells directly, causing so much damage that the cells are forced to self-destruct. Amazingly, this happens only in the cancer cells, not in normal ones. (7)

        Another activity of the green tea compounds is that they aid in detoxifying carcinogens. They cause an increase in detoxification enzymes in the body and make them more active. (8)

 

Specific Results…

        As for specific cancers, here are some study results…

  • Prostate Cancer – the catechins in green tea have been shown to inhibit the production of PSA, a marker for prostate cancer risk. Spread of the cancer is significantly reduced. (9)Ovarian Cancer – women with ovarian cancer who drank at least one cup of green tea per day had a 56% lowered risk of death compared to non-tea drinkers in a three-year study. The green tea suppressed the growth of cancer cells. (10)
  • Colorectal Cancer – Researchers followed 69,710 Chinese women for 6 years. The women ranged in age from 40 to 70. When the study began, it was determined that those who regularly drank green tea were 37% less likely to develop colorectal cancer. By the end of the study, that number had gone up to 57%. (11)

        Similar results have been found in studies on lung cancer, gallbladder cancer and bile duct cancer. (12)

         For patients who have already been diagnosed with cancer, green tea can help cancer drugs do a more effective job. One study showed that green tea compounds helped cancer cells latch on to the very cancer drug that could destroy them. (13) Another study revealed that the negative effects of cancer drugs were offset by the antioxidant action of the green tea. (14)

Enjoy a cup of tea…

With such overwhelming evidence of the cancer-fighting benefits of green tea, it would make sense to add it to your daily diet. As with any tea, it can be enjoyed hot or cold. It is available with or without caffeine, so you can choose according to what suits you best.

         A little honey or the natural sweetener Stevia can add sweetness.  Keep in mind that green tea is the least processed of all the teas, so it doesn’t need vigorous boiling temperatures to brew.  When your water has just started to boil it is hot enough. Pour it over the green tea and steep for just a minute.

         I realize that developing a taste for green tea might be a stretch for the confirmed coffee drinker. But in light of the enormous green tea health benefits, it is worth finding a way to enjoy it.

         For more interesting health news, please check out my other newsletters at ChesapeakeNutraceuticals.com.

         Do consult your personal physician before making significant changes to your normal diet, exercise and supplement routine.

Until next time,

Dr. Ronald Blankstein

Dr. Ronald Blankstein

Sources:

  1. “Cancer Prevention and Green Tea,” MedicineNet.com
  2. “Green Tea,” University of Maryland Medical Center
  3. “Green Tea, “ TheWorld’sHealthiestFoods.com
  4. “Green Tea, “ TheWorld’sHealthiestFoods.com
  5. “Green Tea, “ TheWorld’sHealthiestFoods.com
  6. Manjeshwar S. Baliga, Sreelatha Meleth, Santosh K. Katiyar, “Growth Inhibitory and Antimetastatic Effect of Green Tea Polyphenols on Metastasis-Specific Mouse Mammary Carcinoma 4T1 Cells In vitro and In vivo Systems,” Clin Cancer Res March 1, 2005 11:1918-1927;