New research findings from the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trail suggest increased selenium intake may reduce prostate in some men.
The protective effect was seen in men who were taking a multivitamin supplement, had a high vitamin E intake or were smokers.
For the study, researchers measured blood selenium levels in 724 men with prostate cancer and 879 healthy controls.
After an eight year follow up period, researchers found that among the general population, no protective effect was experienced from a high selenium blood level.
However, men with a high selenium intake who had a high vitamin E intake (greater than 28 IU per day) had a 42 percent reduced risk of prostate cancer. Men who took a daily multivitamin experienced a 39 percent lower risk of prostate cancer, and men who smoked had a 35 percent lower risk of prostate cancer.
Dietary sources of selenium include Brazil nuts, beef, tuna and cod.
These findings were reported in The American Journal of Clinical Nutrition.
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