An Adelaide-led study treated lung cancer cells with two forms of selenium and found Se-methylselenocysteine killed more of them than selenomethionine, and that cells handled the two differently, which the researchers say may explain why selenium trials disagree.
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Cancer
Cigarette smoke damages DNA within minutes, selenium, green tea reduce the risk
University of Minnesota researchers gave 12 volunteers cigarettes spiked with a labeled carcinogen and found blood levels of a DNA-damaging breakdown product peaked 15 to 30 minutes after inhaling. Separate research suggests dietary selenium may curb smoke-related DNA damage.
Minerals
High selenium linked to lower risk of bladder cancer
A meta-analysis of studies from the US, Belgium, Finland and the Netherlands linked higher selenium in serum and toenails to as much as 39 percent lower bladder cancer risk. The effect showed up mainly in women, which researchers attribute to sex differences in how selenium accumulates.
Cancer
Study: Soy and Brazil nuts fight prostate cancer
Genistein from soy and selenium from Brazil nuts, separately and together, slowed the growth of both hormone-dependent and hormone-independent prostate cancer cells and cut MMP-2 expression, with the combination most effective. Healthy prostate cells were unaffected.
Nutrition
Selenium linked to lower risk of diabetes
Following 1,262 French adults for nine years, researchers report in Nutrition & Metabolism that older men in the top third of blood selenium were 50 percent less likely to develop impaired fasting glucose or type 2 diabetes. No benefit showed in women, and high doses can cause poisoning.
Minerals
Too much selenium linked to high levels of cholesterol
A Journal of Nutrition analysis of 1,042 UK adults found those with higher blood selenium had 8 percent higher total cholesterol and 10 percent higher non-HDL cholesterol. The study found only an association; whether selenium raises cholesterol is uncertain.
Minerals
Selenium: The mineral miracle
The piece champions selenium, citing the journal Disease Prevention and Treatment on its action against several cancers and a 1996 University of Arizona study in which 1,300 cancer patients taking 200 mg daily for seven years were 42% less likely to have a recurrence.
Minerals
Selenium strikes powerful blow to skin cancer
A study of 458 Australians in Cancer Epidemiology Biomarkers and Prevention linked higher blood selenium to fewer cases of basal cell and squamous cell carcinoma, a roughly 60 percent reduction, while finding no link between vitamin E levels and reduced carcinoma risk.
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