Green tea and cancer prevention

Drinking leaves from the Camellia sinensis plant has long been said to ward off cancer. But what is the evidence?

Can green tea prevent or even treat cancer?

Cup of tea

It's a question many patients with cancer ask their doctors, often after well-meaning friends have recommended they drink it.

Green tea is one of the three main types of the popular beverage, all made from the same plant: Camellia sinensis. Put simply, green tea is unfermented, black tea is fermented and a third type, oolong tea, is semi-fermented.1

Cancer-preventive effects from green tea have been demonstrated in laboratory models of a number of cancer types,

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