What is the Function of Selenium?

Selenium is a mineral found in soil, water, and some foods. It is required in trace amounts for normal health, and is an essential element in several metabolic pathways.

Selenium is such a vital nutrient that if it is deficient an important enzyme pathway is blocked and body dysfunction may occur. Selenium, along with Vitamin E, is involved in producing the enzyme, glutathionine peroxidase.

In New Zealand we are particularly susceptible to selenium deficiency as selenium is present only at low levels in our soil and thus levels are low in much of our food.

 Recently a renaissance in selenium research has found low selenium levels to be a significant risk for several degenerative diseases.

Clinical research shows that a diet low in selenium may contribute to feelings of depression, anxiety and fatigue. Unfortunately, many adults do not receive the optimal amount of this vital nutrient.

Found naturally in animal protein and vegetables, it is also found in fish, vegetables, and especially Brazil nuts.

Fish, shellfish, red meat, grains, eggs, chicken, liver, and garlic are all good sources of selenium. The amount of selenium in vegetables is dependent on the selenium content of the soil. Brewer's yeast and wheat germ, both considered "health foods," are also good sources of selenium.

Its anti-oxidant functions have now been shown to reduce the risk of many cancers as well as thyroid disease, infertility and arthritis. There is even a suggestion that selenium alters genes that cause cancer.

Selenium also helps support a strong immune system, regulates thyroid function, and may help reduce the risk of prostate and secondary cancers. It also plays a role in the prevention of cataracts and heart disease.

This powerful enzyme acts like a ‘mop in neutralising damaging particles to the body. These particles are commonly known as free radicals. Selenium is also necessary for the production of prostaglandins, substances that affect blood pressure. A prostaglandin deficiency also results in a deficiency of other compounds necessary for keeping the arteries free from platelet aggregation. Pancreatic function also depends upon selenium.

Selenium may also be beneficial for the following ailments: hypertension, stroke, Cystic fibrosis, arthritis, muscular dystrophy, infertility, cancer, circulatory disease and crib death.

 Selenium has been shown to improve the production of sperm and sperm motility. Lack of selenium may lead to changes in fingernails, muscle weakness, and heart problems.

Because selenium preserves tissue elasticity, a deficiency of selenium may lead to premature aging, or liver damage.

There is evidence suggesting prolonged selenium deficiency produces cataracts. Also, research has shown that areas in the world with low soil levels of selenium have a higher incidence of cancer showing the relationship of this vital nutrient to the prevention of disease.

Dosage:

In New Zealand we are particularly susceptible to selenium deficiency as selenium is present only at low levels in our soil and thus levels are low in much of our food.

The Recommended Dietary Allowance (RDA) for adults is 80-200 mcgs. For adult females it is 55 mcg; adult males, 70 mcg; for pregnant females, 65 mcg; for lactating femails, 75 mcg.
of 200mcg of selenium per day.

Levity Vitamins contain the now suggested dosage of 200mcg. Do not exceed this amount and if breast feeding or pregnant consult your health advisor as levels of around 60mcg have been suggested.