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Vinson
VNR Transcript |
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New research may make some of us rethink what juice we're drinking
tomorrow morning |
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In
a preliminary study published in this month's Journal of Medicinal
Food, purple grape juice was shown to provide the participants far
greater antioxidant effect than orange juice. In fact, orange juice
was found to have virtually no antioxidant effect in the study participants
as measured by the researchers. Dr. Joe Vinson, author of the study,
explains... |
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The
take away message is that people looking to promote their cardiovascular
function through increased antioxidant consumption might prefer
a glass of purple grape juice to orange juice. |
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Sixteen
healthy subjects drank two glasses of either grape or orange juice
for a week. Afterwards, the researchers measured the time it took
for the subjects' LDL- the so-called "bad" cholesterol-
to oxidize. The longer it takes for LDL to oxidize, the less likely
it is to contribute to the development of arterial plaque that can
narrow the arteries. |
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"Lag
time", as this measurement is called, is a good indicator of
healthy cardiovascular function. Longer lag time is a measure of
more active antioxidants in our bodies. Subjects consuming purple
grape juice saw their lag times improve by 27 percent, whereas subjects
consuming orange juice saw virtually no effect. |
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Orange
juice is a good source of many nutrients. But for people looking
to promote dietary antioxidants that may help improve their cardiovascular
function, purple grape juice is an excellent choice. |
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Dr.
Vinson added that several previous studies, including a laboratory
measure of antioxidant power by the USDA, suggest that purple grape
juice may be beneficial for those with heart health on the mind.
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This
is Janet Monroe reporting. |
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