Selenium dietary trace element information page
Selenium used to be treated as a very toxic substance, but modern science now regards it as essential - but in small quantities. An overdose or deficiency of selenium is equally bad, and good steady amounts should be available - but in small quantities.
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One of the main activities of this mineral is its anti-aging properties and its ability to help rid the body of free radicals, as well as toxic minerals such as mercury, lead and cadmium.
It is helpful in fighting infections since it stimulates increased antibody response to infections, promotes more energy in the body, and while it helps with alleviating menopausal symptoms in women, it assists the male in producing healthy sperm.
In certain cases selenium has also proven effective in helping to fight cold sores and shingles, which are both caused by the herpes virus.
Some researchers have shown that in selenium-deficient animals a harmless virus can mutate into a virulent form capable of causing damage and death - this has also been followed up with other studies, which seem to indicate that selenium helps to keep the spread and multiplying of viruses in check.
Selenium is also used against arthritis and multiple sclerosis and if provided in adequate amounts it is thought to help prevent cancer as well. Tissue elasticity and pancreatic function is also dependant on this mineral.
In a study it was shown that selenium could be useful in treating certain cancers, and is also helpful in making the blood less "sticky", which is helpful in preventing heart attacks and strokes.
More info on free radicals.
The dosage is the Recommended Daily Allowance (RDA), but be aware that this dosage is the minimum that you require per day, to ward off serious deficiency of this particular nutrient. In the therapeutic use of this nutrient, the dosage is usually increased considerably, but the toxicity level must be kept in mind.
In the case of microelements, such as trace elements, the amounts are very small, yet they are still important and 70 micrograms per day is taken as the required dosage.
As mentioned earlier - selenium is toxic and too large quantities may result in hair loss, tooth decay, brittle nails, white spots, poor appetite, sour taste in the mouth, loss of feeling in the hands and feet, change in skin pigmentation and the breath may have a garlic smell.
Selenium should always be taken with vitamins E, A and beta-carotene, and it is preferable when taking a supplement to take selenium in the form of selenocysteine or selenomethionine, which are both organic.
People with yeast intolerance should check the source of the selenium used in the supplement, as certain manufacturers obtain selenium from yeast.
Men need more selenium than women as it is lost in the seminal fluid, and people staying in areas where the soil is poor in selenium, should also pay attention to their selenium intake.
Brazil nuts are excellent sources of selenium, but are also found in whole grains, shellfish.
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