Whole flax seed is not suitable. Flax seed oil is not as good as milled flax seed. Mix flax seed into bran muffins, homemade bread, your morning cereal. Make sure you eat milled flax seed. Flax seeds must be milled or very very well chewed to be of benefit.
Brazil nuts are very high in selenium which has been found to have strong anti-cancer properties.
Some people claim selenium can effectively destroy cancer cells. 2 brazil nuts contain the recommended daily dose of selenium for a normal healthy adult. Eat lots of tomatoes. They found that eating tomatoes can lower the risk of some forms of cancer. If they can lower the risk of cancer, they might be able to fight cancer.