Concord grape juice is a potent antioxidant that compares favorably to supplements
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.
OByrne, 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: email@example.com
Elizabeth Horowitz | EurekAlert!
The most recent press releases about innovation >>>
Die letzten 5 Focus-News des innovations-reports im Überblick:
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.
Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...