Can the amount of selenium in a mans body predict if he is more or less likely to develop prostate cancer? Is there a test for such predictions and how would the measurements be interpreted?
A. Selenium is a trace element that is not routinely measured in blood samples to predict prostate cancer risk. Studies suggest a 50% to 66% reduction in risk for advance cancer in men with the highest selenium status as determined by the level of selenium in toenail clippings.(Yoshizawa K, et al. Study of prediagnostic selenium level in toenails and the risk of advanced prostate cancer. J Natl Cancer Inst. 1998; 90: 1219-1224).
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