The main ingredient of green tea is tea polyphenols  Recently, a large number of animal experiments have found that tea polyphenols can inhibit tumor cell proliferation and promote tumor cell death  However, through the study of a large number of people, some experts did not find that the more tea they drank, the lower the incidence of cancer
If tea is polluted by heavy metals, pesticides and other carcinogens in the process of production, processing and transportation, the more tea you drink, the higher the risk of cancer
 Accordingly, they do not think that drinking tea regularly can prevent cancer