Green Tea, Coffee, and Diabetes

  1. Tsung O. Cheng, MD
  1. From George Washington University, Washington, DC.

    TO THE EDITOR:

    Iso and colleagues (1) reported an inverse relation between consumption of green tea (not black tea) and risk for diabetes, attributing it to caffeine. However, the importance of other constituents in the green tea should not be underestimated (2).

    For ages, plants containing flavonoids have been used to treat diabetes in Indian medicine (3). The green tea flavonoid has been shown …

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