Selenium: importance and sources
Selenium is a trace mineral essential for many body processes, selenium is found in soil. In the body, selenium is present in virtually every cell but is most abundant in the kidneys, liver, spleen, pancreas, and testes. In recent years, the role of selenium in the prevention of a number of degenerative conditions including cancer, inflammatory diseases, thyroid function, cardiovascular disease, neurological diseases, aging, infertility, and infections, has been established by laboratory experiments, clinical trials, and epidemiological data. Selenium works with vitamin E to help prevent cancer and heart disease, protects against cataracts and macular degeneration, fights viral infections; reduces the severity of cold sores and shingles; may slow the progression of HIV/AIDS, and helps relieve lupus symptoms. Since many foods are good sources of selenium, and the recommended dietary allowance is small-only 55 micrograms (mcg) a day. Selenium has received a lot of attention recently for its role in combating cancer. A study showed that 200 mcg of selenium daily resulted in 63％ fewer prostate tumors, 58％ fewer colorectal cancers, 46％ fewer lung malignancies, and 39％ overall decrease in cancer deaths. In other studies, selenium showed promise in preventing cancers of the ovaries, cervix, rectum, bladder, esophagus, pancreas, and liver, as well as against leukemia. Studies of cancer patients indicate that people with the lowest selenium levels developed more tumors, had a higher rate of disease recurrence, a greater risk of cancer spreading, and a shorter overall survival rate that those with high blood levels of selenium.
selenium trace mineral metal Dietary sources
Emhemmed abdullah Hebshi
Department of Chemistry, Faculty of Science, Aljabel algharbi University
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
18-19
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）