Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Concord grape juice is a potent antioxidant that compares favorably to supplements

21.11.2002


Flavonoids that are found in fruit, vegetables, chocolate, tea, wine, and grape juice reduce cellular oxidative stress and are associated with a reduced risk of heart disease and cancer. Concord grape juice is a rich source of flavonoids, but it has not been compared to antioxidant supplements in terms of its efficacy in reducing oxidative stress. In an article in the American Journal of Clinical Nutrition, O’Byrne et al. compared the effects of Concord grape juice (CGJ) and antioxidant supplements in a group of healthy subjects, and found that CGJ is a potent, long-lasting antioxidant that compares favorably to supplements in its action and perhaps has unique properties that supplements do not.



The 32 participants, who were all healthy and averaged 28 years old, were assigned to receive 400 IU of á-tocopherol (an antioxidant supplement), or 10 mL per day of 100% CGJ over a 2-week period. Prior to and throughout the study, the subjects were on a flavonoid-restricted diet to ensure that the primary source of flavonoids in their diets was either from the grape juice or the supplements, and fasting blood samples were collected before, during, and after the study period. Both CJG and antioxidant supplements provided significant antioxidant protection to serum, plasma proteins, and low-density lipoproteins (LDL). A unique finding was that CGJ has a previously unknown antioxidant capability of reducing the concentration of oxidized protein in the blood by 20%, which the supplements did not.

The authors suggest that future studies should investigate the long-term antioxidant effects of CJD in combination with a well-defined diet. CGJ is a popular beverage that could provide an everyday method for prevention of chronic disease in all age groups.



O’Byrne, Dawn J, et al. Comparison of the antioxidant effects of Concord grape juice flavonoids and á-tocopherol on markers of oxidative stress in healthy adults. Am J Clin Nutr 2002;76:1367-74.

This media release is provided by The American Society for Clinical Nutrition to provide current information on nutrition-related research. This information should not be construed as medical advice. If you have a medical concern, consult your doctor. To see the complete text of this article, please go to:

For more information, please contact: jialal@pathology.swmed.edu.

Elizabeth Horowitz | EurekAlert!
Further information:
http://www.faseb.org/ajcn/Dec2002/13603.Jialal.PDF

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Electron cryo-microscopy: Using inexpensive technology to produce high-resolution images

Biochemists at Martin Luther University Halle-Wittenberg (MLU) have used a standard electron cryo-microscope to achieve surprisingly good images that are on par with those taken by far more sophisticated equipment. They have succeeded in determining the structure of ferritin almost at the atomic level. Their results were published in the journal "PLOS ONE".

Electron cryo-microscopy has become increasingly important in recent years, especially in shedding light on protein structures. The developers of the new...

Im Focus: The spin state story: Observation of the quantum spin liquid state in novel material

New insight into the spin behavior in an exotic state of matter puts us closer to next-generation spintronic devices

Aside from the deep understanding of the natural world that quantum physics theory offers, scientists worldwide are working tirelessly to bring forth a...

Im Focus: Excitation of robust materials

Kiel physics team observed extremely fast electronic changes in real time in a special material class

In physics, they are currently the subject of intensive research; in electronics, they could enable completely new functions. So-called topological materials...

Im Focus: Electrons in the fast lane

Solar cells based on perovskite compounds could soon make electricity generation from sunlight even more efficient and cheaper. The laboratory efficiency of these perovskite solar cells already exceeds that of the well-known silicon solar cells. An international team led by Stefan Weber from the Max Planck Institute for Polymer Research (MPI-P) in Mainz has found microscopic structures in perovskite crystals that can guide the charge transport in the solar cell. Clever alignment of these "electron highways" could make perovskite solar cells even more powerful.

Solar cells convert sunlight into electricity. During this process, the electrons of the material inside the cell absorb the energy of the light....

Im Focus: The lightest electromagnetic shielding material in the world

Empa researchers have succeeded in applying aerogels to microelectronics: Aerogels based on cellulose nanofibers can effectively shield electromagnetic radiation over a wide frequency range – and they are unrivalled in terms of weight.

Electric motors and electronic devices generate electromagnetic fields that sometimes have to be shielded in order not to affect neighboring electronic...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Contact Tracing Apps against COVID-19: German National Academy Leopoldina hosts international virtual panel discussion

07.07.2020 | Event News

International conference QuApps shows status quo of quantum technology

02.07.2020 | Event News

Dresden Nexus Conference 2020: Same Time, Virtual Format, Registration Opened

19.05.2020 | Event News

 
Latest News

Black phosphorus-based van der Waals heterostructures for mid-infrared light-emission applications

13.07.2020 | Physics and Astronomy

Polarization of Br2 molecule in vanadium oxide cluster cavity and new alkane bromination

13.07.2020 | Life Sciences

Researchers present concept for a new technique to study superheavy elements

13.07.2020 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>