Selenium is a trace mineral that is believed to be a potent protector against cancer because selenium has been shown to activate the very powerful antioxidant enzyme glutathione peroxidase, an antioxidant found in every cell that works with vitamin E to prevent free-radical damage. Selenium also stimulates the thyroid hormones, prevents buildup of fats in the blood vessels, enhances immune-system functioning, and protects against heavy-metal poisoning.
It's been shown in more than twenty countries that the lower the intake of selenium, the higher the incidence of cancer of the colon, breast, pancreas, ovary, bladder, prostate, rectum, skin, and lungs. Similarly, low selenium intake has been associated with increased risk of cardiovascular disease, inflammatory diseases, cataracts, and premature aging.
Good Food Sources: Whole grains, asparagus, garlic, mushrooms, soybeans, tuna, seafood, pineapples, and brown rice. (The amount of selenium in the soil varies greatly by geographic region, and it affects the selenium level of food grown in the soil.)
Signs of Deficiency: Signs of selenium deficiency include dry scalp and skin problems.
Uses of Selenium : Selenium is used to treat allergies and asthma, anxiety, arteriosclerosis, cancer, cataracts, gingivitis, heart attack and cardiovascular disease, macular degeneration and rheumatoid arthritis.