Bad Year for Favorites
When Put to the Test, Americans' Most Trusted Supplements Failed
http://www.washingtonpost.com/wp-dyn/content/article/2006/06/19/AR2006061900835_pf.htmlBy January W. Payne
Washington Post Staff Writer
Tuesday, June 20, 2006; HE01
Millions of Americans who regularly take vitamins and other popular dietary supplements have had their faith in those products challenged in the past year as the substances fared poorly in several large clinical trials and a federal panel's scientific review.
The supplements tested are widely used but few had previously been put to large-scale, well-designed clinical trials. The findings showed that some of Americans' most trusted supplements -- including some, such as multivitamins and calcium, that doctors have recommended for decades -- failed to show the benefits they were believed to offer.
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Loose regulation of dietary supplements by the Food and Drug Administration (FDA), noted in the federal panel's May report on multivitamins, complicates the testing of products. Even if researchers know what constitutes an effective dose, formulas can vary from brand to brand, and even batch to batch, and what's on the label isn't always what's in the bottle, tests have shown.
The multivitamin panel supported the recommendation of a 2005 Institute of Medicine committee, urging the FDA to more closely monitor the safety of dietary supplements. The panel said the FDA should educate consumers and health professionals about the upper limits that can safely be consumed for various supplements and institute a "formal, mandatory, adverse-event reporting system for dietary supplements."
Recent findings about supplements underscore the importance of healthy eating, experts said.
"There is a very big difference between eating a healthy diet and eating components of that diet
that we think are the healthy players," said Thomas G. Sherman, an associate professor in physiology and biophysics at the Georgetown University Medical Center. "By taking specific supplements we aren't mimicking what's going on with a good, healthy diet," because interactions occur with vitamins and minerals in food that aren't replicated by taking supplements.
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