Is coffee good for you or bad for you? It depends. From Genes decide if coffee hurts or helps your heart:
Coffee can raise or reduce your chances of suffering a heart attack — it all depends on your genes, researchers suggest.People with a genetic makeup that causes them to metabolise caffeine more slowly have a 36% greater risk of heart attack if they drink two to three cups of coffee a day than people with the same gene who drink one cup or less a day, according to a new study. And if they drink more than four cups, this risk rises to 64%.
“Our data suggest that the longer caffeine is lingering in the system, the more harm it can do,” says Ahmed El-Sohemy at the University of Toronto, Canada, who led the study.
On the other hand, individuals who metabolised caffeine quickly and consumed two to three cups of coffee a day had a 22% reduction in the risk of heart attack compared with those with the same genetic makeup who consumed just one cup or less each day.
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People who carry two copies of the CYP1A2*1A gene may break down caffeine up to four times faster than those carrying the CYP1A2*1F gene, according to El-Sohemy.