Happiness may be good for your health

A happy heart just might be a healthier one as well, new research suggests.

In a study of nearly 3,000 healthy British adults, lead by Dr. Andrew Steptoe of University College London, found that those who reported upbeat moods had lower levels of cortisol -- a "stress" hormone that, when chronically elevated, may contribute to high blood pressure, abdominal obesity and dampened immune function, among other problems. (Reuters)