6. Garlic (including onions, scallions, leeks, and chives)
Garlic contains a number of compounds believed to slow or stop the growth of tumors. One such compound, diallyl disulfide, appears to be especially potent in protecting against skin, colon, and lung cancer, though it is not known exactly how it functions.
Grapes and wine contain a chemical called resveratrol, which has been shown to be a potent antioxidant and anti-inflammatory agent. Resveratrol is thought to work by preventing cell damage before it begins. Red and purple grapes are the richest sources of resveratrol.
8. Green Tea (decaf)
Green tea is a rich source of a class of flavonoids known as catechins. Laboratory studies have shown that the catechins present in green tea are able to slow or prevent the development of cancer in colon, liver, breast, and prostate cells.
The anti-cancer compound in tomatoes, lycopene, has been shown to be especially potent in combating prostate cancer. This compound appears to be more easily absorbed if the tomatoes are eaten in cooked form-either as tomato sauce, paste, or juice. In addition to preventing prostate cancer, lycopene may also protect against breast, lung, stomach, and pancreatic cancer.
10. Whole Grains
Whole grains contain a variety of anti-cancer compounds, including fiber, antioxidants, and phytoestrogens. When eaten as part of a balanced diet, whole grains can help decrease the risk of developing most types of cancer. For more, see 7 Whole Grains to Add to Your Diet.