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Dark chocolate seen healthy for arteries

Eating dark chocolate may have a protective effect on the cardiovascular system in healthy people

Dark chocolate seen healthy for arteries

Eating dark chocolate may have a protective effect on the cardiovascular system in healthy people. Epidemiological studies suggest that high flavonoid intake confers a benefit on cardiovascular outcome. Researchers from the Athens Medical School in Greece point out that the elasticity or stiffness of arteries are important determinants of cardiovascular performance and are predictors of cardiovascular risk. They examined the effects of flavonoid-rich dark chocolate on blood-vessel function in 17 young, healthy volunteers over a 3-hour period after they consumed 100 grams of a commercially available dark chocolate. The researchers saw that an artery in the arm dilated significantly more in response to an increase in bloodflow. Chocolate consumption also led to a significant 7-percent decrease in aortic stiffness. The predominant mechanism appears to be dilation of small and medium-sized peripheral arteries and arterioles. The team didn't detect any change in antioxidant levels, so suggested other possible explanations. The dilatory effect of chocolate under resting conditions can be attributed to improved nitric oxide bioavailability, prostacyclin increase, direct effect of chocolate in smooth muscle cells, or activation of central mechanisms.
American Journal of Hypertension,
June 2005
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