SOIL SITUATION
Selenium, a cancer-fighting antioxidant, is a supplementation must.
A powerful mineral that works with vitamin E to function as an antioxidant, selenium should be part of every adult’s daily intake. Oxidation occurs in the body, creating potentially dangerous free radicals capable of damaging cells and causing DNA mutations that can result in cancer cells over time. Preventing this by incorporating antioxidants into nutrition and supplementation is essential for optimal aging. Antioxidants prevent the creation of free radicals and help clean up existing ones. Selenium is also important for the adequate production of the thyroid hormone, and is thought to improve immune function.
Getting appropriate selenium in the diet requires living in an area with adequate levels of the mineral in the soil. Dietary sources include wheat germ, Brazil nuts, meat and seafood. Those consuming the Standard American Diet or taking acid-suppressing medications are most at risk for selenium deficiency. Because selenium is required for the adequate synthesis of thyroid hormone, those with thyroid problems should consider having their levels checked, or beginning supplementation.
Most of the evidence on selenium has been focused on its connection to decreased cancer rates. Other reasons to ensure adequate intake are its possible link with improved immune function and cardiovascular support, although the evidence is less substantial. High doses (900 mcg and above) should be avoided, as toxicity can occur.
General selenium supplementation is recommended, as dietary intake, due to varying levels of selenium in soils, is unpredictable. A daily intake of organically grown Brazil nuts is a great source. It’s easiest to incorporate selenium as part of a multivitamin complex, preferably in selenomethionine or selenium-rich yeast form.
• Those at average risk of cancer: 100 mcg daily
• Those with increased risk of cancer: 200 mcg daily
Can people already diagnosed with cancer take selenium in combination with other cancer-fighting medications?
I have not seen any trials with selenium in already existing cancer. My gut tells me that supplementing with 100-200 mcg daily as part of a multivitamin is a good idea, but this should be discussed with your oncologist as some chemotherapies rely on oxidation to kill the cancer cells. Overdoing antioxidants during this time may work against you.
Are there any medications that increase the need for selenium supplementation?
Any medications that decrease stomach acid, like the medications commonly used for gastroesophageal reflux disease, may decrease the body’s ability to absorb selenium. People taking these medications for long periods of time should strongly consider supplementation along with a general multivitamin.
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