4/18/2012 7:11:10 AM
Being cheerful may protect against heart problems, say US experts. Happy, optimistic people have a lower risk of heart disease and stroke, a Harvard School of Public Health review of more than 200 studies - reported in Psychological Bulletin - suggests. While such people may be generally healthier, scientists think a sense of well-being may lower risk factors such as high blood pressure and cholesterol.
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