Many foods include (grain products, seafood, meat and poultry) are major sources of selenium. Seafood accounts for approximately 30% of the dietary selenium intake.
Drinking water has not been found to provide significant amounts of selenium in the diet.
The good news is there are some good dietary sources of selenium: Mushrooms, egg yolks, seafood, poultry and kidney, liver and muscle meats contain the mineral. Vegetables -- garlic, onions, broccoli, asparagus, tomatoes and others -- as well as whole grains and seeds can also be good sources of selenium.
Cereal products make a major contribution to intake because of the relatively large amount of them consumed in most diet.
However, because the amount of selenium in vegetables and grains depends on the selenium content in the soil in which they are grown.
Another good source of the element is nuts, particular Brazil nuts.
The selenium content of food is largely dependent on the content of volcanic ash in the soil on which the food was grown, with higher volcanic ash content yielding higher selenium levels. Soil that is irrigated by seawater, such as much of California's cropland, also contains higher levels of selenium.
Researchers also know that soil in the high plains of northern Nebraska and the Dakotas have very high levels of selenium.
Selenium from natural food sources has a higher bioavailability than functional foods or nutraceuticals and dietary supplements.
Food sources of selenium
