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Selenium May Protect Against Bladder Cancer

by Brandon on Wed Sep 01, 2010 5:39 am
Aug. 31, 2010 -- Adding more selenium to your diet may reduce your risk of bladder cancer.

Scientists reporting in the September issue of Cancer Epidemiology, Biomarkers & Prevention say that adults with low blood levels of the mineral selenium are more likely to develop bladder cancer. The lower your levels of selenium, the higher your risk.

Selenium is a trace mineral found in soil. Dietary sources of selenium include plant foods and meats from animals that grazed on grain or plants grown in selenium-rich soil. The nutrient is also found in certain nuts. For example, brazil nuts often contain an abundance of selenium.

The body uses selenium to make selenoproteins. Many selenoproteins function as antioxidants, which prevent cellular damage. Some studies have suggested that selenium can help protect against certain cancers, but clinical trials on selenium supplementation have yielded conflicting results.

For the current study, Nuria Malats, MD, PhD, leader of the Genetic and Molecular Epidemiology Group of the Human Cancer Genetics Program at the Spanish National Cancer Research Center, and colleagues combined information from seven previously published studies to conduct their research. They reviewed selenium levels taken from blood samples and toenail clippings and determined each patient's risk of developing bladder cancer. The analysis included patients mostly from the United States and some patients from Europe.
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