Dark chocolate improves blood flow and reduces the hardening of peripheral arteries, according to researchers from the Sapienza University of Rome. A new study published in the Journal of the American Heart Association indicates that polyphenols, an antioxidant plant compound found in high amounts in dark chocolate, may help fight arterial and other diseases and promote overall health.
The
study involved 20 patients between the ages of 60 and 78 who were
suffering from peripheral artery disease. Researchers had each patient
walk on a treadmill prior to giving half the group dark chocolate with
85 percent or higher cocoa content, and the other half milk chocolate,
which contained only 30 percent or less cocoa content.
Two hours after digesting the chocolate, the patients walked on the
treadmill again as their progress was measured by researchers. Those who
had been given the dark chocolate walked 11 percent farther than those
who had eaten the milk chocolate. They also walked 15 percent longer
than they had before being given the chocolate, leading researchers to
speculate that nutrients in the dark chocolate are responsible for
better blood flow to the legs.
Other
studies have suggested similar blood-flow benefits from eating dark
chocolate, with or without high flavanol content, as well as benefits in
lowering stroke risk and reducing age-related memory loss.
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