One of the most delicious and then easily available sources of selenium is corn. But not any sort! Corn flakes, the so-called "Flakes", are produced from varieties that are rich in this element, and can include it in quantities sufficient for prevention. A handful of such flakes, eaten in the morning with milk,only without sugar! - can play a big role in the prevention of cancer. But we need to get on the package mentioned the actual content of selenium.
However, if the soil selenium enough, and normal balanced diet should provide us with a sufficient quantity. To do this, however, necessary analysis of the mineral composition of soil, flora, fauna, and human blood. Practiced enrichment of the soil, where growing corn, selenium with appropriate fertilizers.