Supplements Look Risky In Study Of Older Women | WAMU 88.5 - American University Radio

NPR : News

Filed Under:

Supplements Look Risky In Study Of Older Women

Eating too much, rather than not enough, is the big health problem for most Americans. Yet, many of us take a supplement or vitamin in the hope of staving off illness with big doses of particular nutrients.

A new study shows that might not be such a great idea. Use of many common supplements — iron, in particular — appeared to increase the risk of dying, and only calcium supplements appeared to reduce mortality risk. The increased risk amounted to a few percentage points in most instances.

The findings come from a study of more than 38,000 older women in Iowa. In 1986, when the study got rolling, two-thirds of the women (average age 62) were taking a vitamin or supplement. By 2004, 85 percent were.

The bad news is that the findings went against so many of the supplemental nutrients — from multivitamins to zinc. Yes, it's true that the study's data came from people's own reports about what they took instead of randomizing treatment between supplements and a placebo.

Even so, the results are striking. "Although we cannot rule out benefits of supplements, such as improved quality of life, our study raises a concern regarding their long-term safety," the authors of the study write. Then, they say, "Based on existing evidence, we see little justification for the general and widespread use of dietary supplements." The study results appear in the latest issue of Archives of Internal Medicine.

And it's probably worth noting that calcium, which did relatively well in this study, has been problematic in other research, such as an analysis last year that found use an increased risk of heart trouble, but not deaths, in older women.

A commentary on the latest study says taking supplemental doses of nutrients beyond biological minimums is usually a mistake: "We think the paradigm 'more is better' is wrong."

Still want a nutritional supplement? Try the produce aisle instead.

"A better investment would be eating more fruits and vegetables," writes Dr. Rita Redfern, editor of the Archives of Internal Medicine. The journal put its "Less is More" label on the study because supplements haven't been shown to carry a mortality benefit and have been shown to increase various health risks.

Previously in the journal's "Less is More" series, five things primary care doctors should do less often to improve care and the case against narcotics as treatment for chronic pain.

Copyright 2011 National Public Radio. To see more, visit http://www.npr.org/.

NPR

For Native Alaskans, Holiday Menu Looks To The Wild

Thanksgiving menus traditionally celebrate the bounty of late fall. In rural Alaska, that means walrus, moose, fermented fish heads and Eskimo ice cream — salmonberries mixed with Crisco.
NPR

The Native American Side Of The Thanksgiving Menu

The first Thanksgiving was something of a joint venture between pilgrims and Native Americans. Chef Richard Hetzler shares a menu that celebrates the first settlers and the country's first tribes.
NPR

EPA Proposes New Rules To Curb Ozone Levels

The rules would lower the threshold for ozone from 75 parts per billion to between 65 ppb to 70 ppb. They are likely to be opposed by industry groups as well as Republicans.
NPR

Weekly Innovation: A Seat That Fits In Your Pocket

The Sitpack is a compact seat shaped like a monopod that fits in your pocket when folded up. Creator Jonas Lind-Bendixen says the product could be used during travel or while waiting at a concert.

Leave a Comment

Help keep the conversation civil. Please refer to our Terms of Use and Code of Conduct before posting your comments.