|
Eating
real dark chocolate is sweet to the taste ... and beneficial to
the heart. According to research, the flavonoid-rich substance could
have a shielding effect on the cardiovascular system, at least in
the three hours directly following consumption.
Moreover, epidemiological studies suggest that high flavonoid intake
presents a benefit on cardiovascular outcome.
Finding Sweet Success
Athens Medical School researchers investigated the effects of dark
chocolate on cardiovascular performance in 17 young, healthy volunteers
over a three-hour time span; the volunteers ate 100 grams of a commercially
available dark chocolate.
By the numbers:
-
An artery in the arm dilated more significantly in response
to an increase in blood flow.
-
Aortic stiffness decreased by 7 percent.
-
Resting and hyperemic brachial artery diameters increased significantly
(0.15-0.18 mm).
Since researchers were unable to detect a change in antioxidant
levels, other possible explanations for the dilatory effect of chocolate
under resting conditions include improved nitric oxide bioavailability,
prostacyclin increase, direct effect of chocolate in smooth muscle
cells or activation of central mechanisms.
One caveat to the study, however, was that it was conducted over
a very short time span, meaning researchers were unable to measure
the longer-term effects of eating chocolate--whether positive or
negative.
American
Journal of Hypertension June 2005, Vol. 18, Issue 6: 785-791
Food
Navigator.com Europe June 28, 2005
|