Saturday, February 22, 2014

The risks posed by high doses of dietary supplements

This is a valuable and revealing study about the dangers posed by the over-use of dietary supplements.  What we once thought - or were told - was good for us, turns out to be quite the opposite. 

"Many people think that dietary supplements are helpful or at the least innocuous. This is not true," said corresponding and first author Alan Kristal, Dr.P.H., a faculty member in the Public Health Sciences Division of Fred Hutch. "We know from several other studies that some high-dose dietary supplements – that is, supplements that provide far more than the daily recommended intakes of micronutrients – increase cancer risk. We knew this based on randomized, controlled, double-blinded studies for folate and beta carotene, and now we know it for vitamin E and selenium."

Selenium and vitamin E supplements can increase risk of prostate cancer in some men
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