Supplements: selenium overdose could increase risk of “high grade” cancer by 91%

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Supplements became popular around the turn of the century, promising an immediate boost to health. But there is growing evidence that caution is required when taking vitamins and minerals. One study found that selenium in overdose, cold increases the risk of high grade prostate cancer by up to 91%. The study authors cautioned against using selenium and vitamin E supplementation for men.

There has long been a widespread belief that supplements are harmless, but it couldn’t be further from the truth.

In fact, researchers believe that some supplements offer no benefits, just risks.

Selenium is one of them, with researchers pointing out that an overdose of a supplement could increase the risk of developing high-grade cancer by 91%.

The findings, published in the Journal of the National Cancer Institute, point out that information about the purported benefits of dietary supplements can be misleading.

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But when consumed by people whose levels were already high, the risk of high-grade cancers increased by 91%.

The researchers also found that people high in selenium at the start of the study who took vitamin E supplements had their risk of prostate cancer increased by 69% and their risk of high-grade cancer by 111%.

Lead author of the study, Dr Alan Kristal of the Fred Hutchinson Cancer Research Center in Seattle, said: to prevent major chronic disease.

“Men using these supplements should stop, period. Neither selenium nor vitamin E supplementation confers any known benefits, only risks. “

Dr Kristal went on to suggest that the public is often misled into thinking that dietary supplements are only beneficial.

“A lot of people think that dietary supplements are useful or at least harmless,” he explained.

“This is not true. We know from several other studies that certain high-dose dietary supplements, that is, supplements that provide much more than the recommended daily intake of micronutrients, increase the risk of Cancer.

“We knew it from double-blind, randomized controlled studies for folate and beta-carotene, and now we know it or vitamin E and selenium.”


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