Can chocolate prevent heart attacks?
hey were so addicted, they just could not give up their favourite daily snack -- not even in the interest of science.Who knew that chocolate was part of a heart healthy diet. Do you think the ones in the heart shaped box on Valentines are even better for you?But chocolate lovers who flunked out of a Johns Hopkins University study on aspirin and heart disease helped researchers stumble on an explanation of why a little chocolate a day can cut the risk of heart attack.
It turns out chocolate, like aspirin, affects the platelets that cause blood to clot, Diane Becker of the Johns Hopkins University's School of Medicine and her colleagues discovered.
"What these chocolate offenders taught us is that the chemical in cocoa beans has a biochemical effect similar to aspirin in reducing platelet clumping, which can be fatal if a clot forms and blocks a blood vessel, causing a heart attack," Becker said in a telephone interview.
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The blood of the chocolate eaters was slower to clot than the blood of the volunteers who resisted chocolate, Becker told a meeting of heart experts in Chicago.
In a urine test, the chocolate lovers had lower levels of a platelet waste product called thromboxane.
"Does it help a little bit? Yes," Becker said. "But it does not have anywhere near the magnitude of the effects of a single baby aspirin a day."
Nonetheless, Becker's team wants to study the effects of eating chocolate on a "free-living" population of volunteers. They will measure how much chocolate people eat and then watch them for several years to see if chocolate-eaters have a different rate of heart attacks, stroke and heart operations.
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