The consumption of olive oil does not increase or decrease the risk of cancer. There is no benefit from taking phytochemicals as supplements. They are, however, present in large quantities in fruits, vegetables, beans, and grains. Salt Moderate intake of salt is not associated with an increased risk of cancer. Selenium Selenium supplements are not recommended.
Grains are the best source of natural selenium.
Soybeans Soybeans appear to have a beneficial effect on hormone-dependent cancers in animals. Their effect in humans is unclear. They are, however, an excellent protein source and a good alternative to meat. Supplements As of yet, supplements are not recommended in lieu of whole foods. The complex relationship between nutrition and cancer risk is shown by the failure of many studies to demonstrate a positive influence of vitamin or mineral supplements on the development of cancer.