Featured Research

from universities, journals, and other organizations

Evidence For Protective Effect Of Fish Oil Not Conclusive

Date:
January 1, 2009
Source:
BMJ-British Medical Journal
Summary:
Fish oil protects against deaths from heart problems, but doesn't provide a clear benefit in heart rhythm problems, according a new study.

Fish oil protects against deaths from heart problems, but doesn't provide a clear benefit in heart rhythm problems (arrhythmias), according a study published on the British Medical Journal website.

More funding is urgently needed in this neglected area of nutrient research, say the authors of an accompanying editorial.

Consuming oily fish at least two to four times a week is recommended for patients after a heart attack. But the evidence for the protective effect of fish oil supplements is based on one large trial from over 10 years ago. More recent trials have showed no beneficial effect of fish oil on patient outcomes.

In an attempt to resolve the uncertainty, Professor Ross Tsuyuki and colleagues from Canada systematically reviewed randomised trials of fish oil as a dietary supplement in the prevention of cardiac deaths and arrhythmias (abnormal electrical activity in the heart that can lead to death), in more than 30,000 participants in 12 studies.

Fish oil was found to be effective at reducing deaths from heart problems, but showed no strong evidence of a beneficial effect on arrhythmias or deaths from all causes.

Three of the studies involving over 11,000 participants analysed the effect of fish oil supplementation on the reduction in implantable cardiac defibrillator interventions and reported a neutral effect. Six studies of over 31, 000 patients examined the effect of fish oil on sudden cardiac death and showed no benefit. A further 11 studies showed a 20% reduction in deaths from heart problems.

Interestingly, no evidence was found for a dose-response effect between type of fish oil and reduction in deaths from heart problems, so it was not possible for the researchers to suggest an optimal dose or formulation of fish oil.

In the accompanying editorial, Dr Eric Brunner and Professor Hiroyasu Iso say that the review emphasises the lack of available high quality evidence and the neglect of this important area of nutrient research.

They call for increased funding to resolve the uncertainty surrounding the protective effect of fish oil, to help the millions of people with heart disease and to protect the world's marine life—which, they say, is facing extinction for commercial gain, partly, and maybe unnecessarily, in the name of public health.


Story Source:

The above story is based on materials provided by BMJ-British Medical Journal. Note: Materials may be edited for content and length.


Cite This Page:

BMJ-British Medical Journal. "Evidence For Protective Effect Of Fish Oil Not Conclusive." ScienceDaily. ScienceDaily, 1 January 2009. <www.sciencedaily.com/releases/2008/12/081223193112.htm>.
BMJ-British Medical Journal. (2009, January 1). Evidence For Protective Effect Of Fish Oil Not Conclusive. ScienceDaily. Retrieved April 23, 2014 from www.sciencedaily.com/releases/2008/12/081223193112.htm
BMJ-British Medical Journal. "Evidence For Protective Effect Of Fish Oil Not Conclusive." ScienceDaily. www.sciencedaily.com/releases/2008/12/081223193112.htm (accessed April 23, 2014).

Share This



More Plants & Animals News

Wednesday, April 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Leopard Bites Man in India

Raw: Leopard Bites Man in India

AP (Apr. 22, 2014) A leopard caused panic in the city of Chandrapur on Monday when it sprung from the roof of a house and charged at rescue workers. (April 22) Video provided by AP
Powered by NewsLook.com
Iowa College Finds Beauty in Bulldogs

Iowa College Finds Beauty in Bulldogs

AP (Apr. 22, 2014) Drake University hosts 35th annual Beautiful Bulldog Contest. (April 21) Video provided by AP
Powered by NewsLook.com
805-Pound Shark Caught Off The Coast Of Florida

805-Pound Shark Caught Off The Coast Of Florida

Newsy (Apr. 22, 2014) One Florida fisherman caught a 805-pound shark off the coast of Florida earlier this month. Video provided by Newsy
Powered by NewsLook.com
Breakfast Foods Are Getting Pricier

Breakfast Foods Are Getting Pricier

AP (Apr. 21, 2014) Breakfast is now being served with a side of sticker shock. The cost of morning staples like bacon, coffee and orange juice is on the rise because of global supply problems. (April 21) 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