This paper has been published by the Journal Consomer Eroski, Eroski Foundation, of which was performed the next copy.

Antioxidant action of selenium

This trace mineral helps the body to prevent degenerative diseases

The presence and requirement of selenium in the body is small. However, this does not detract important since, besides noted for their antioxidant properties, this mineral is related to the activity similar to vitamin E. The nuts and vegetables are foods with higher content of selenium, although a varied diet ensures an adequate supply of this trace element.

Terms antioxidants

- Image: Jean Marconi -

Breathing is essential for the organism. Oxygen contributes to the production of free radicals, molecules that lead to lifelong negative health effects by altering the DNA (genes), proteins and fats.

Some human cells are renewed continuously (skin, intestine), while others do not have this possibility (liver cells). Over the years, free radicals may favor a genetic alteration on the first, which contributes to increased risk of cancer or reduce the functionality of the latter, a characteristic of aging. A group of vitamins, minerals, natural dyes and enzymes called antioxidants block the harmful effects of free radicals. Foremost among these selenium.

Functions

propia del organismo. Selenium slows the damaging effect of free radicals as part of glutathione peroxidase, an antioxidant enzyme in the body itself. This ensures destruction of hydrogen peroxide, which is formed as a result of oxidation. The role of selenium is to avoid this process by acting on the cells and cell membranes.

This mineral is linked to the immune system because it can increase production of white blood cells. So we study its protective action against cancer, cardiovascular diseases and aging. Other important functions are involved in neutralizing the effect of heavy metals and their involvement in the metabolism of lipids or fats. Some studies suggest even that a diet deficient in selenium may negatively influence male fertility.

SOURCES SELENIUM

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The Brazil nut is the food most amount of selenium. However, it is as little known as the mineral itself. We are whole grains, seafood, fish, meat and dairy products. Vegetables are also a good source of selenium, although its content depends on the presence of this trace element in cropland.

A varied diet with animal and plant products, ensuring a sufficient supply of selenium to the body. Its deficiency in the human body is rare, but when it happens, cause muscle pain and heart problems. Several studies link the geographical areas with a lower presence of selenium in the soil and consequently in food grown in it, due to overexploitation of the land. In these areas could be detected a higher incidence of cancer in the population, although research in this area are inconclusive.

The recommended daily allowance is 50 micrograms (a microgram is one millionth of a gram), which is satisfied by a balanced diet. In specific circumstances may require an additional contribution, as in people with unhealthy eating habits, smokers or elderly.

Source: www.consumer.es