Hoa quả và rau đối với bệnh ung thư Tùy chọn

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Trích từ nguồn: http://www.kushiinstitute.org/html/research.html

Fruits and Vegetables and Cancer

In a review of 200 studies that examined the relationship between fruit and vegetable intake and cancer at selected sites, researchers found that consumption of these foods offered a significantly protective effect in 128 of 156 dietary studies in which results were expressed in terms of relative risk. For lung cancer, these foods were protective in 24 of 25 studies after control for smoking in most instances. Fruit was protective for tumors of the esophagus, oral cavity, and larynx in 28 of 29 studies. Vegetables and fruit were protective in 26 of 30 studies for the pancreas and stomach, as well as in colorectal and bladder cancers (23 of 38 studies). For malignancies of the cervix, ovary, and endometrium, a significant protective effect was shown in 11 of 13 studies. In breast cancer, a protective effect was found to be strong and consistent in meta-analysis. Overall, the relative risk of cancer was about twice as high for those eating few fruits and vegetables compared to those who ate plenty of these foods.

"In 1854, John Snow stopped a cholera epidemic simply by taking the handle off the pump. The research presented above suggests that consumption of fruits and vegetables may be a handle that, if manipulated by public policy, clinical advice, and public education, could have a substantial impact on a wide range of cancers," the researchers concluded.

Source: Gladys Block et al., "Fruits, Vegetables, and Cancer Prevention: A Review of the Epidemiological Evidence," Nutrition and Cancer 18:1-29, 1992.