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Mushrooms and their extracts, as well as polyphenols in green tea, seem to be anticarcinogenic for breast cancer. In China, where both mushrooms and green tea are dietary staples, breast cancer incidence is four- to fivefold lower than is typical in developed countries. Could these dietary habits help account for the lower rates? Researchers compared the diets of 1009 women in Hangzhou, China, who had newly diagnosed breast cancer with those of 1009 healthy, age-matched women. Participants completed one-time questionnaires that assessed their intake of foods, including fresh and dried mushrooms and green tea.
Women who had breast cancer were less educated, less likely to have used oral contraceptives or hormone therapy, and more likely to ha…