A new report finds [5].. “Health experts have long warned of the risk of obesity, but a new Japanese study warns that being very skinny is even more dangerous, and that slightly chubby people live longer.People who are a little overweight at age 40 live six to seven years longer than very thin people, whose average life expectancy was shorter by some five years than that of obese people, the study found.” “We found skinny people run the highest risk,” said Shinichi Kuriyama, an associate professor at Tohoku University’s Graduate School of Medicine who worked on the long-term study of middle-aged and elderly people.