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, OByrne 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.
Elizabeth Horowitz | EurekAlert!
World first: Massive thrombosis removed during early pregnancy
20.07.2017 | Universitätsspital Bern
Therapy of preterm birth in sight?
19.07.2017 | Universitätsspital Bern
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.
To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...
The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....
A one trillion tonne iceberg - one of the biggest ever recorded -- has calved away from the Larsen C Ice Shelf in Antarctica, after a rift in the ice,...
Physics supports biology: Researchers from PTB have developed a model system to investigate friction phenomena with atomic precision
Friction: what you want from car brakes, otherwise rather a nuisance. In any case, it is useful to know as precisely as possible how friction phenomena arise –...
19.07.2017 | Event News
12.07.2017 | Event News
12.07.2017 | Event News
20.07.2017 | Information Technology
20.07.2017 | Materials Sciences
20.07.2017 | Physics and Astronomy