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DNA Is Not Destiny When It Comes To Heart Risk
By Richard Harris
You can't choose your parents, so you can't help it if you're born with genes that increase your risk of heart disease. But a study finds that you can reduce that risk greatly with a healthful lifestyle.
Scientists have been wondering whether that's the case. To find out, one international consortium looked at data from four large studies that had isolated genetic risk factors for heart disease.
They identified genetic markers that seem to put people at nearly twice the risk for heart disease.
The scientists then dug further into their data to look at behavior that helps the heart, as well as at the influence of obesity. Specifically, they looked at smoking habits, obesity, diet and exercise. People who were healthy — based on at least three of those criteria — were considered, for the purposes of the study, to be following a healthful lifestyle.
The scientists were pleased to discover that the benefits of those good habits were strong, even for people who carried genetic traits that raised their risk. (Healthful habits actually benefited everyone, regardless of inherited risk.)
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