But Mr. Tait, 50, does pay more than $20,000 a year for a membership to Hooke, a private health clinic based in London with an emphasis on longevity. Discovering he had high cholesterol ...

So, what are the main factors that could help boost longevity, including our health spans? Research published in the past 12 months points to three clear factors: diet, exercise, and social life.

The rate of increase of longevity has varied considerably across U.S. states since 1991. This paper examines the effect of the quality of medical care, behavioral risk factors (obesity, smoking, and ...