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.

In the study, published in the American Journal of Epidemiology, women who reported more positive emotions had lower blood levels of two proteins that indicate widespread inflammation in the body. Chronic inflammation is believed to contribute to a range of ills over time, including heart disease and cancer.

Researchers have long noted that happier people tend to be in better health than those who are persistently stressed, hostile or pessimistic.