Bookmark Website  | Free Registration  | The Team
The Lounge  | Champions  | The Wire |  Schedule |  Audio  |  Arcade  |  The Top Ten  |  Historical  |  Email  |  Video

Vitamin C May Improve Smokers Blood Circulation


A dose of vitamin C may give a quick boost to the poorer-than-average blood circulation seen in healthy young smokers, a study suggests. The study of 25 healthy men found that although smokers initially showed poorer results on a test of blood flow to the heart that changed after they took a large dose - 2 grams - of vitamin C.

Shortly after taking the vitamin, the 13 smokers showed blood circulation on par with that of the 12 non-smokers, according to findings published in a leading heart journal.

However, lest smokers think they can undo heart damage by chasing a cigarette with a vitamin C pill, the researchers say their findings underline the dangers of smoking.

Vitamin C is a potent antioxidant, a substance that helps clear the body of cell-damaging molecules called oxygen free radicals. Because of this, it's thought that the vitamin may counter the "oxidative stress" that smoking puts on the lining of the blood vessels - a mechanism by which smoking leads to artery disease.

The new study looked at the effect of oral vitamin C on coronary flow velocity reserve (CFVR), a measure of how well blood flow speeds up to help the heart when it's under high demands. Past research has shown that smokers show poorer blood-vessel dilation in response to blood flow, and have a diminished CFVR.

The research team used a non-invasive ultrasound technique to measure CFVR in smokers and non-smokers, before and after they took vitamin C. They found that before taking the vitamin, smokers had a lower CFVR than non-smokers did. Two and four hours after the dose of vitamin C, however, smokers' average CFVR was "restored" to a more-normal level.

Though the men in the study were given a large dose of vitamin C, researchers pointed out that it's probably useless to take doses beyond 200 milligrams, because the body will excrete the excess.

Moreover, it's not clear that loading up on vitamin C can benefit smokers. Some trials have found that taking C supplements does not improve smokers' blood vessel function, at least in the short term.

Researchers said further, large-scale trials should look at whether daily vitamin C supplements cut smokers' long-term risk of coronary artery disease.

Tanya Roberts is research associate, www.onlinesmoker.com


MORE RESOURCES:

New York Times (blog)

Dangerous Dietary Supplements Return to Store Shelves
New York Times (blog)
The new study, published in JAMA, the Journal of the American Medical Association, found that out of more than two dozen supplements that were pulled from shelves after they were found to contain anabolic steroids or powerful prescription drugs ...
Banned Drugs Still Turning Up In Weight-Loss SupplementsNPR (blog)
Tainted supplements sold after recalls, study saysUSA TODAY
Recalled, drug-tainted supplements still available for purchaseReuters
ABC News -Los Angeles Times -WebMD
all 144 news articles »


Recalled supplements still contain banned drugs, still for sale
Tech Times
Years after product recalls supposedly took them off store shelves, some dietary supplements having potentially unsafe prescription drug ingredients are still available for purchase, a study has determined. Researchers making online purchases said they ...



Potentially Dangerous Drugs Still In Some Recalled Supplements, Study Finds
Huffington Post
CHICAGO (AP) — Dietary supplements containing potentially dangerous prescription drug ingredients may still be for sale even years after safety recalls, a study found. In supplements bought online, researchers detected hidden steroids, similar ...



Diet Supplements Contain Illegal Drugs Years After Recalls
Live Science
Many dietary supplements that have been recalled can still be purchased years later, and they often contain the same banned ingredients that led to their recall in the first place, a new study finds. In the study, researchers purchased 27 dietary ...



Detroit Free Press

life
Detroit Free Press
Tainted dietary supplements often continue to be spiked with hidden and potentially dangerous drugs months and even years after being the subjects of product recalls, according to research published Tuesday in the Journal of the American Medical ...



Telegraph.co.uk

Are sports supplements 'a big rip off'?
Telegraph.co.uk
Take one bag of powdered protein, another of carbohydrate, a spot of caffeine, some creatine, a bit of capsicum, some green tea extract, bag them up in various proportions, and you are pretty much ready to join the booming sports supplement industry.



Food Safety News

Dietary Supplements Contained Banned Drugs After FDA Recalls
Food Safety News
A new study finds that a high percentage of dietary supplements still contained banned drugs at least six months after being recalled by the U.S. Food and Drug Administration (FDA). Approximately half of all FDA class-I drug recalls since 2004 have ...



Presence of Banned Drugs in Dietary Supplements Following FDA Recalls
JAMA: The Journal of the American Medical Association
Prior research has found that even after FDA recalls, dietary supplements remain available on store shelves.4 However, it is not known if the supplements on sale after FDA recalls are free of the adulterants. In the present study, dietary supplements ...



Capital FM Kenya

Treu - I Brought 'No Supplements' Policy
Capital FM
Nairobi — National rugby sevens head coach Paul Treu has called on transparency in the Government-sponsored Anti-Doping Agency report that accused him and his staff of introducing supplements by the trade name 'Evox' that purportedly contained ...
Kenya 7s coach Treu lambastes report linking him to dopingGlobalPost
Treu blasts doping reportSuperSport

all 11 news articles »


Drug-tainted supplements still available for purchase, study finds
Boston Globe
Hundreds of dietary supplements containing illegal drugs have been voluntarily recalled from the market in recent years at the urging of the US Food and Drug Administration, but a significant number have remained available for purchase with their same ...


Google News


Advertisement



Section Site Map - Submit News - Feedback - Comments - Advertise with Us

Copyright 2006 Luminati Inc. All rights reserved.