Selenium is an essential mineral that helps protect cells against oxidative damage from free radicals. It is necessary for thyroid function and immune system functioning, as well as for overall health. The recommended daily intake for adults is 55 micrograms, states the University of Maryland Medical Center. Prior to using selenium supplements, consult with a health care professional.
Immune System Functioning
The human immune system depends on vitamins and minerals to help it function properly; selenium is one of these substances. According to the University of Maryland Medical Center, selenium is said to help build white blood cells, which are crucial for the body to fight infection and stay healthy. Individuals who are deficient in selenium have been shown to have a faster progression of certain viral illnesses, leading to the hypothesis that selenium may also have anti-viral properties, states the Linus Pauling Institute.
Cancer Survival
Numerous studies have found that low levels of selenium have been linked with a higher incidence of cancer death, states the University of Maryland Medical Center. The exact mechanism of how selenium works in preventing cancer and cancer deaths is not known, but individuals with cancer tend to have low levels of selenium. This mineral may not help reduce the risk of all cancers, but an increase in selenium intake has been associated with a lower risk of prostate cancer. Higher selenium intakes also helped reduce the risk of dying from colorectal and lung cancer deaths, states the National Institutes of Health Office of Dietary Supplements. If you have cancer or a family history of cancer, talk to your doctor about whether selenium may be beneficial for you.
Sperm Production
Some proteins found in sperm are made by selenium and other antioxidants, states the University of Maryland Medical Center. While adequate amounts of selenium can help improve male fertility, if too much selenium is consumed, sperm motility can be impaired. Before using selenium for male infertility or problems with sperm, consult your doctor about whether selenium is safe and appropriate for your situation.
HIV/AIDS
Individuals with HIV or AIDS experience severe deficiencies of the immune system. According to the National Institutes of Health Office of Dietary Supplements, a selenium deficiency in patients in this population increases the risk of death, lowered immune cell counts and increased progression of the disease. The mechanisms by which selenium affects individuals with HIV or AIDS are still being studied, and more research is needed. If you have HIV or AIDS, consult your health care provider about whether a selenium supplement may be helpful, and incorporate foods rich in selenium into your diet including tuna, beef, chicken, eggs, oatmeal and walnuts.
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