Over the last few decades, several randomized, double-blind, placebo-controlled trials have shown that a daily dose of just 200 mcg of selenium can slash breast cancer risk by 82%, reduce colon and rectal cancer risk by 69%, cut prostate cancer risk by 54%, and cut lung cancer risk by 39%. Imagine the media frenzy that a cancer drug that reduced the occurrence of breast cancer by 82% would receive!
Selenium is believed to protect against cancer by disrupting the carcinogenic process before it makes headway … by preventing tumors from forming. Selenium’s antioxidant properties are also cancer protective, as is its ability to inhibit DNA mutations.
Selenium also promotes thyroid health. It does so by converting stored thyroid T4 hormones into active T3 hormones. Your endocrine system requires this conversion in order to function properly. Interestingly, endocrine balance is crucial for preventing breast and prostate cancers—two of the cancers selenium is proven to fight.
Good dietary sources of selenium include wheat germ, oats, sunflower seeds, and mushrooms. Eggs and poultry also provide selenium, as does seafood, including tuna, salmon, shrimp, and halibut. However, due to contamination from polluted waters, plant sources are a safer option.
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