Selenium Strikes Out
Many individuals take selenium dietary supplements, inspired by some promising early analysis suggesting that this antioxidant mineral could assist stop most cancers (notably prostate) and coronary heart illness.
Lately, nonetheless, well-designed research haven’t discovered advantages, and a few have prompt potential hurt. Right here’s the most recent, principally disappointing, information:
A brand new assessment by the Cochrane Collaboration of 55 research on selenium consumption and most cancers discovered that in most observational research, males who consumed essentially the most selenium of their weight loss program tended to have a decrease threat of a number of cancers. There was minimal impact in ladies. However the Cochrane researchers questioned the standard of those research. And the extra dependable scientific trials, utilizing dietary supplements, failed to verify the advantages.
“There isn’t any convincing proof that selenium dietary supplements can stop most cancers,” the researchers concluded, although they referred to as for extra analysis. Two years in the past, after reviewing the analysis, the Meals and Drug Administration (FDA) reached comparable conclusions particularly relating to selenium and prostate most cancers.
A latest Canadian examine within the Journal of Scientific Oncology examined selenium dietary supplements (200 micrograms a day), mixed with vitamin E and soy (each additionally with proposed anti-cancer potential), in males with a precancerous situation that put them at excessive threat for invasive prostate most cancers. After three years, the lads taking the dietary supplements have been simply as more likely to develop invasive most cancers as these taking a placebo.
Analysis on selenium’s impact on blood ldl cholesterol (in addition to coronary heart illness) has produced conflicting outcomes. A latest examine within the Annals of Inner Medication examined varied doses of selenium dietary supplements in 500 older folks in Britain, the place selenium consumption tends to be low.
After six months, ranges of whole and LDL (“dangerous”) ldl cholesterol decreased, however the small drops are unlikely to be clinically important. Furthermore, the researchers cautioned that the findings don’t justify selenium dietary supplements, notably in international locations the place selenium consumption is satisfactory, such because the U.S., and since the protection of selenium capsules is unsure.
Backside line: Eat meals wealthy in selenium, reminiscent of entire grains and nuts. Brazil nuts are the richest supply; one medium nut has 95 micrograms, greater than the beneficial dietary allowance (RDA)—restrict your self to a few a day.
However skip the dietary supplements, due to the inconsistent analysis outcomes. Some analysis has linked larger selenium consumption with elevated most cancers threat and blood levels of cholesterol. And several other research have prompt that prime doses could enhance the danger of diabetes. The consequences of the dietary supplements could rely largely in your preliminary selenium standing. That’s, in case your weight loss program provides satisfactory quantities, extra selenium is unlikely to do any good and could also be dangerous. Most Individuals already get greater than sufficient.