Featured Research

from universities, journals, and other organizations

Eating citrus fruit may lower women's stroke risk

Date:
February 23, 2012
Source:
American Heart Association
Summary:
Eating higher amounts of a compound in citrus fruits, especially oranges and grapefruit, may lower ischemic stroke risk. Women who ate high amounts of the compound had a 19 percent lower risk of ischemic stroke than women who consumed the least amount.

Eating higher amounts of a compound in citrus fruits, especially oranges and grapefruit, may lower ischemic stroke risk.
Credit: © andersphoto / Fotolia

A compound in citrus fruits may reduce your stroke risk, according to research reported in Stroke: Journal of the American Heart Association. Eating higher amounts of a compound in citrus fruits, especially oranges and grapefruit, may lower ischemic stroke risk. Women who ate high amounts of the compound had a 19 percent lower risk of ischemic stroke than women who consumed the least amount.

This prospective study is one of the first in which researchers examine how consuming flavonoid subclasses affects the risk of stroke. Flavonoids are a class of compounds present in fruits, vegetables, dark chocolate and red wine.

"Studies have shown higher fruit, vegetable and specifically vitamin C intake is associated with reduced stroke risk," said Aedín Cassidy, Ph.D., the study's lead author and professor of nutrition at Norwich Medical School in the University of East Anglia in Norwich, United Kingdom.

"Flavonoids are thought to provide some of that protection through several mechanisms, including improved blood vessel function and an anti-inflammatory effect."

Cassidy and colleagues used 14-years of follow-up data from the Nurse's Health Study, which included 69,622 women who reported their food intake, including details on fruit and vegetable consumption every four years. Researchers examined the relationship of the six main subclasses of flavonoids commonly consumed in the U.S. diet -- flavanones, anthocyanins, flavan-3-ols, flavonoid polymers, flavonols and flavones -- with risk of ischemic, hemorrhagic and total stroke.

As expected, the researchers didn't find a beneficial association between total flavonoid consumption and stroke risk, as the biological activity of the sub-classes differ. However, they found that women who ate high amounts of flavanones in citrus had a 19 percent lower risk of blood clot-related (ischemic) stroke than women who consumed the least amounts.

In the study, flavanones came primarily from oranges and orange juice (82 percent) and grapefruit and grapefruit juice (14 percent). However, researchers recommended that consumers increase their citrus fruit intake, rather than juice, due to the high sugar content of commercial fruit juices.

A previous study found that citrus fruit and juice intake, but not intake of other fruits, protected against risk of ischemic stroke and intracerebral hemorrhage. Another study found no association between yellow and orange fruits and stroke risk, but did link increased consumption of white fruits like apples and pears with lower stroke risk. An additional study found that Swedish women who ate the highest levels of antioxidants -- about 50 percent from fruits and vegetables -- had fewer strokes than those with lower antioxidant levels.

More studies are needed to confirm the association between flavanone consumption and stroke risk, and to gain a better understanding about why the association occurs, the authors said.

The National Institutes of Health funded the research.

Co-authors are: Eric B. Rimm, Sc.D.; Éilis J. O'Reilly, Sc.D.; Giancarlo Logroscino, M.D., Ph.D.; Colin Kay, Ph.D.; Stephanie E. Chiuve, Sc.D.; and Kathryn M. Rexrode, M.D., M.P.H. Author disclosures are on the manuscript.


Story Source:

The above story is based on materials provided by American Heart Association. Note: Materials may be edited for content and length.


Journal Reference:

  1. Aedín Cassidy, Eric B. Rimm, Éilis J. O'Reilly, Giancarlo Logroscino, Colin Kay, Stephanie E. Chiuve, and Kathryn M. Rexrode. Dietary Flavonoids and Risk of Stroke in Women. Stroke, February 23 2012 DOI: 10.1161/STROKEAHA.111.637835

Cite This Page:

American Heart Association. "Eating citrus fruit may lower women's stroke risk." ScienceDaily. ScienceDaily, 23 February 2012. <www.sciencedaily.com/releases/2012/02/120223182638.htm>.
American Heart Association. (2012, February 23). Eating citrus fruit may lower women's stroke risk. ScienceDaily. Retrieved September 17, 2014 from www.sciencedaily.com/releases/2012/02/120223182638.htm
American Heart Association. "Eating citrus fruit may lower women's stroke risk." ScienceDaily. www.sciencedaily.com/releases/2012/02/120223182638.htm (accessed September 17, 2014).

Share This



More Health & Medicine News

Wednesday, September 17, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

President To Send 3,000 Military Personnel To Fight Ebola

President To Send 3,000 Military Personnel To Fight Ebola

Newsy (Sep. 16, 2014) — President Obama is expected to send 3,000 troops to West Africa as part of the effort to contain Ebola's spread. Video provided by Newsy
Powered by NewsLook.com
Obama Orders Military Response to Ebola

Obama Orders Military Response to Ebola

AP (Sep. 16, 2014) — Calling the Ebola outbreak in West Africa a potential threat to global security, President Barack Obama is ordering 3,000 U.S. military personnel to the stricken region amid worries that the outbreak is spiraling out of control. (Sept. 16) Video provided by AP
Powered by NewsLook.com
UN: 20,000 Could Be Infected With Ebola by Year End

UN: 20,000 Could Be Infected With Ebola by Year End

AFP (Sep. 16, 2014) — Nearly $1.0 billion dollars is needed to fight the Ebola outbreak raging in west Africa, the United Nations say, warning that 20,000 could be infected by year end. Duration: 00:40 Video provided by AFP
Powered by NewsLook.com
Obama: Ebola Outbreak Threat to Global Security

Obama: Ebola Outbreak Threat to Global Security

AP (Sep. 16, 2014) — President Obama is ordering U.S. military personnel to West Africa to deal with the Ebola outbreak, which is he calls a potential threat to global security. (Sept. 16) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

    Technology News



    Save/Print:
    Share:  

    Free Subscriptions


    Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

    Get Social & Mobile


    Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

    Have Feedback?


    Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
    Mobile iPhone Android Web
    Follow Facebook Twitter Google+
    Subscribe RSS Feeds Email Newsletters
    Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins