Navigation Links
Antioxidants -- too much of a good thing?
Date:7/21/2013

In older men, a natural antioxidant compound found in red grapes and other plants -- called resveratrol -- blocks many of the cardiovascular benefits of exercise, according to research published today [22 July 2013] in The Journal of Physiology.

Resveratrol has received widespread attention as a possible anti-aging compound and is now widely available as a dietary supplement; much has been made of its role in explaining the cardiovascular health benefits of red wine, and other foods. But now, new research at The University of Copenhagen surprisingly suggests that eating a diet rich in antioxidants may actually counteract many of the health benefits of exercise, including reduced blood pressure and cholesterol.

In contrast to earlier studies in animals in which resveratrol improved the cardiovascular benefits of exercise, this study in humans has provided surprising and strong evidence that in older men, resveratrol has the opposite effect.

What is emerging is a new view that antioxidants are not a fix for everything, and that some degree of oxidant stress may be necessary for the body to work correctly. This pivotal study suggests that reactive oxygen species, generally thought of as causing aging and disease, may be a necessary signal that causes healthy adaptations in response to stresses like exercise. So too much of a good thing (like antioxidants in the diet) may actually be detrimental to our health.

Lasse Gliemann, a PhD student who worked on the study at The University of Copenhagen, explains how they conducted the research, and the results they found: "We studied 27 healthy, physically inactive men around 65 years old for 8 weeks. During the 8 weeks all of the men performed high-intensity exercise training and half of the group received 250 mg of resveratrol daily, whereas the other group received a placebo pill (a pill containing no active ingredient). The study design was double-blinded, thus neither the
'/>"/>

Contact: Lucy Holmes
lholmes@physoc.org
44-020-726-95727
Wiley
Source:Eurekalert

Page: 1 2

Related biology news :

1. Antioxidants may ease PAD blood pressure increase
2. Diet high in total antioxidants associated with lower risk of myocardial infarction in women
3. Powerful class of antioxidants may be potent Parkinsons treatment
4. Too much of a good thing? Too many healing cells delays wound healing
5. Cant smell anything? This discovery may give you hope
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/17/2014)... German . ... also provide us with a continuous stream of information about ... sit still in a car the world glides by ... Seemingly without effort, our brain calculates self-motion from this "optic ... a steady gaze during our own movements. Together with biologists ...
(Date:4/17/2014)... professor Rajendra Singh Thursday as a "Champion of ... solar deployment in the residential, commercial and industrial ... of Electrical and Computer Engineering and director of ... local hero leading the charge across the country ... power and driving policy changes at the local ...
(Date:4/17/2014)... in France have hit on a novel method ... the correct and most effective treatment possible., Kidney ... western and developing world. If left untreated, apart ... renal failure and other complications. In many patients ... Clearly a more effective pathological approach to diagnosis ...
Breaking Biology News(10 mins):How vision makes sure that little fish do not get carried away 2How vision makes sure that little fish do not get carried away 3How vision makes sure that little fish do not get carried away 4White House honors Clemson professor as 'Champion of Change' for solar deployment 2
... people depends on peaceful coexistence with a swarm of ... food to energy to protection from disease. Now, with ... to create a predator-fooling light organ and a fish that ... like a flashlight to illuminate the dark nooks of the ...
... A part of the Strait of Juan de Fuca, ... a potential "hot spot" for toxic harmful algal blooms ... scientists found that under certain conditions, toxic algal cells ... transported to nearshore areas, where they may trigger harmful ...
... Screening a chemical library of 200,000 compounds, researchers ... classes that can be used to study and possibly ... cancer and degenerative diseases. "The identification of these ... an important step in developing therapeutic agents," said Dr. ...
Cached Biology News:Single gene lets bacteria jump from host to host 2Single gene lets bacteria jump from host to host 3'Hot spot' for toxic harmful algal blooms discovered off Washington coast 2UT Southwestern researchers disrupt biochemical system involved in cancer, degenerative disease 2
(Date:1/14/2014)... DC (PRWEB) January 14, 2014 Carahsoft ... for Thursday, January 23, 2014 at 2pm EST (11am ... Knowledge.” The topic focuses on how technology can turn ... critical decisions for government agencies. The online webinar will ...
(Date:1/14/2014)... Jan. 14, 2014  3D Communications, a leading provider of strategic communications ... and media events in the United States ... Virginia Cox , JD, is returning to the firm,s ... re-joins 3D after more than two years of service as ...
(Date:1/14/2014)... 2014 EquitiesIQ, a leading informational research ... Alliqua is an emerging biomedical company acquiring, developing, manufacturing, ... market. , Free report download: http://equitiesiq.com/reports/alliqua/ , ... management team and Board, which launched the company’s new ...
(Date:1/14/2014)... Md. , Jan. 14, 2014  Organovo announced today ... the National Institutes of Health (NIH) to help scientists ... treatments to patients on a faster timeline. Organovo is ... (NCATS) and the National Eye Institute (NEI) to develop ...
Breaking Biology Technology:Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2Former FDA Associate Commissioner Returns To 3D Communications 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3Organovo Announces Collaboration with National Institutes of Health 2Organovo Announces Collaboration with National Institutes of Health 3
... -- Careers in manufacturing are high-wage and high-tech. Yet, ... It appears a negative public perception - one that ... - is thwarting young adults from pursuing manufacturing careers ... 10 million new skilled workers by 2020, according to ...
... low prices. When it comes to consumer goods, America is ... fanatical commitment to low prices, Wal-Mart is the biggest low-price ... the place to get it. , ,The company that many ... lately. Union and activist groups have successfully derailed its growth ...
... Stunden, chief information officer and director of the Division ... has announced plans to retire in summer 2006 after ... ,"We have made some phenomenal accomplishments during that time," ... our relationship with partners across campus and built a ...
Cached Biology Technology:State campaign seeks to reverse negative perception of manufacturing work 2State campaign seeks to reverse negative perception of manufacturing work 3State campaign seeks to reverse negative perception of manufacturing work 4State campaign seeks to reverse negative perception of manufacturing work 5Wal-Mart: How low can you go? 2Wal-Mart: How low can you go? 3Wal-Mart: How low can you go? 4Stunden to retire as UW-Madison CIO 2
4',6-Diamidino-2-phenylindole dihydrochloride...
...
Normal Bovine Serum; U.S. sourced, ideal for those who seek an uncompromising quality. Low Hemoglobin levels; U.S. sourced, ideal for those who seek an uncompromising quality. Low Hemoglobin lev...
12(S)-HETE-d8 is used as an internal standard for the quantification of 12(S)-HETE by stable isotope dilution mass spectrometry....
Biology Products: