Washington, D.C. Tuesday, February 10, 2009
--?A new study published today claiming that multivitamin use by
postmenopausal women does little to improve their risk of mortality
fails to take into account important dietary factors or accurately
grasp how dietary supplements and health claims are regulated by the
U.S. Food and Drug Administration (FDA). According to the study, which
was published in the February 9 issue of Archives of Internal Medicine,
postmenopausal women who take multivitamins have the same risk of dying
from ?most common cancers, cardiovascular disease or of any cause as
women who do not take multivitamin supplements.?
?While
cohort and observational studies like these can be important, they in
no way constitute convincing or conclusive evidence,? said Daniel
Fabricant, Ph.D., vice president of scientific and regulatory affairs
for the Natural Products Association. ?This study fails to tell the
whole story about the positive effect that vitamins and minerals can
have on health. It also does not take into account important factors
such as nutrients gained through diet.??
Fabricant
said it is ?unprincipled? that the authors arbitrarily lumped
supplement types into generalized categories that do not represent
nutrient intake accurately.? And when coupled with the fact that
nutrient intake through the diet was not accounted for, Fabricant
explained, the study has no means of establishing a baseline for which
to draw any comparisons or eliminate bias.
Also troubling was the author?s apparent lack of understanding about how dietary supplements are regulated.
?The
authors seem to be confused or unaware of how supplements are regulated
and exactly what constitutes a health claim authorized by the FDA,?
Fabricant said. ?For example, they cite that there is only one
supplement, folic acid, worthy of a public health recommendation by way
of a health claim. However, even a cursory visit to the FDA?s Web site
would have revealed that other nutrients and dietary ingredients,
including the very calcium and vitamin D that they studied, also have
FDA-authorized health claims.? The FDA was granted the ability to
approved or authorize claims explaining a nutrient?s positive health
benefits when supported by research as a result of the 1994 regulating
dietary supplements.
More
than 180 million Americans take dietary supplements regularly to
supplement inadequate diets and maintain and improve health.
Taken
as whole, the research on dietary supplements in the prevention of
chronic diseases, is strong and consistent,? said Fabricant. ?To
suggest that taking vitamins and minerals with a demonstrated health
benefit is unnecessary sends the wrong public health message."
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