Navigation Links
Finding Out How Flavonoids Protect the Heart
Date:7/10/2008

Meta-analysis shows specific cardiovascular effects of chocolate, soy protein, green tea

THURSDAY, July 10 (HealthDay News) -- For years, scientists have known that flavonoids, antioxidants found in foods as diverse as fruit, vegetables, herbs, grains and chocolate, are heart-healthy.

Now, researchers who looked at the effects of flavonoid-rich foods on cardiovascular disease risk factors such as high blood pressure have linked certain foods with specific benefits.

Health benefits associated with flavonoids have been reported for decades, but it's still difficult for experts to make specific recommendations about which flavonoids to eat for specific health effects because of a lack of data. Antioxidants slow or prevent the oxidative process caused by substances called free radicals, which can cause cell dysfunction and the onset of heart disease and other health problems.

In the new study, Dr. Lee Hooper, a lecturer at the University of East Anglia in Norwich, U.K., and colleagues sifted through the 133 studies to look at the links between different flavonoid subclasses and flavonoid-rich foods on different risk factors for cardiovascular disease, such as unhealthy cholesterol, high blood pressure and blood flow.

Among the findings:

  • Eating chocolate or cocoa increased a measure called flow-mediated dilation, which is a good indication of blood flow in the veins. It also reduced blood pressure, both systolic (the upper number, reflecting the maximum pressure exerted when the heart contracts) by about 6 points, and diastolic (the bottom number, reflecting the maximum pressure when the heart is at rest), by about 3.3 points. But it didn't seem to have an effect on so-called "bad" LDL cholesterol.
  • Soy protein reduced diastolic blood pressure by almost 2 points of mercury and improved bad cholesterol but didn't improve so-called good HDL cholesterol. But those effects were found just for isolated soy protein, not for other soy products.
  • A habit of green tea drinking reduced bad cholesterol levels, but drinking black tea boosted both systolic and diastolic pressure -- by 5.6 points for systolic and 2.5 for diastolic.

As more research on flavonoids becomes available, it is likely that no single one will emerge as a "miracle food, but that many will contribute to our cardiovascular health," said Hooper, whose review was published in the July issue of The American Journal of Clinical Nutrition.

The new review helps define the role of foods rich in antioxidants, said Dr. Johanna Geleijnse, a nutritional epidemiologist at Wageningen University, the Netherlands, who co-authored an editorial to accompany the report.

"Evidence is accumulating that these substances are more important to cardiovascular health than vitamin C and vitamin E," and this most recent analysis strongly suggests good effects on blood pressure and blood vessel function, she said.

But much remains to be found out, she added.

Meanwhile, what to do? Eat a good mixture of the flavonoid-rich foods you like best, said Hooper. "For me, this would include lots of fruit, small amounts of a good dark chocolate (at least 70 percent cocoa), plus the basics like onions and green tea and an occasional glass of red wine."

More information

To learn more about flavonoids, visit the American Dietetic Association.



s o`f mer



SOURCES: Johanna M. Geleijnse, Ph.D., nutritional epidemiologist, Wageningen University, the Netherlands; Lee Hooper, Ph.D., S.R.D., lecturer, research synthesis and nutrition, University of East Anglia, Norwich, U.K.; July 2008, The American Journal of Clinical Nutrition


'/>"/>
Copyright©2008 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Many Parents Share Genetic Test Findings With Kids
2. New Alzheimers findings: High stress and genetic risk factor lead to increased memory decline
3. New MRI finding sheds light on multiple sclerosis disease progressio
4. High and mighty: first common height gene identified by researchers behind obesity gene finding
5. Scientists, physicians present latest findings in personalized cancer treatment and prevention
6. Health psychologists discuss latest research findings
7. Incidental findings found when radiologists take a broader look at renal MRA
8. First significant genetic finding in severe PMS, or PMDD
9. Chair of U.S. Preventive Services Task Force Pledges to Recommend Re-evaluation of Recent Glaucoma Findings
10. The Organic Trade Association Hails Preliminary Research Findings Showing Nutritional Benefits of Organic Products
11. Key findings for all veterans seen in depression and suicide study
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Finding Out How Flavonoids Protect the Heart 
(Date:6/25/2016)... Austin, TX (PRWEB) , ... June 25, 2016 , ... ... Fellow of the American College of Mohs Surgery and to Dr. Russell Peckham for ... popular and highly effective treatment for skin cancer. The selective fellowship in Mohs Micrographic ...
(Date:6/25/2016)... CA (PRWEB) , ... June 25, 2016 , ... As ... with Magna Cum Laude and his M.D from the David Geffen School of Medicine ... and returned to Los Angeles to complete his fellowship in hematology/oncology at the UCLA-Olive ...
(Date:6/24/2016)... ... June 24, 2016 , ... A recent article ... people are unfamiliar with. The article goes on to state that individuals are now ... of these less common operations such as calf and cheek reduction. The Los Angeles ...
(Date:6/24/2016)... ... June 24, 2016 , ... The ... in Dallas that it will receive two significant new grants to support its ... PHA marked its 25th anniversary by recognizing patients, medical professionals and scientists for ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... Topical BioMedics, Inc, makers of Topricin and ... that call for a minimum wage raise to $12 an hour by 2020 and then ... will restore the lost value of the minimum wage, assure the wage floor does not ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... June 23, 2016 Any dentist who has made ... the current process. Many of them do not even offer ... difficulties and high laboratory costs involved. And those who ARE ... at such a high cost that the majority of today,s ... Dr. Parsa Zadeh , founder of Dental Evolutions Inc. ...
(Date:6/23/2016)... Research and Markets has announced the addition of the ... to 2022" report to their offering. ... financial data derived from varied research sources to present unique ... on the market during the next five years, including a ... markets, regional and country level analysis. The report provides a ...
(Date:6/23/2016)... MOUNTAIN VIEW, Calif. , June 23, 2016 ... 9:00 a.m. CST on Thursday, July 7, 2016 , , ... kayla.belcher@frost.com ) , , , , EXPERT PANELISTS:  ... Sciences, Nitin Naik; Senior Industry Analyst, Christi Bird; Senior Industry Analyst, ... The global pharmaceutical industry is witnessing ...
Breaking Medicine Technology: