Fruit, vegetables, and cancer prevention: a review of the epidemiological evidence.
This review evaluated over 200 scientific studies on the association between fruit and vegetable consumption and cancer. People with low fruit and vegetable intake had a double risk to develop cancer, compared to those who had high intake of these foods. The protective effects of fruits and vegetables were confirmed in a large number of cancers, i.e. lung, esophagus, oral cavity (i.e. throat), pancreas, stomach, colorectal, bladder, uterus, ovary and breast cancers. The authors concluded that the increased consumption of fruits and vegetables could have great benefits for public health. Further details can be found in the study.
Block G, Patterson B, Subar A. Fruit, vegetables, and cancer prevention: a review of the epidemiological evidence. Nutr Cancer. 1992;18(1):1-29.