London -  Being too heavy may cost you your life — literally. Scientists say overweight people die one year earlier than expected and that moderately obese people die up to three years prematurely.

Doctors have long warned that being overweight can lead to health complications including heart disease, stroke and cancer, and previous studies have already found that extra pounds can take years off your life, based mostly on data from Europe and North America.

In the new study, which the authors say is the largest-ever such analysis, researchers sifted through data for nearly 4 million non-smoking adults in 32 countries published from 1970 to last year. They compared the risk of death to people’s body mass index, or BMI, a measure of body fat that is calculated using height and weight.

They defined a BMI from 18.5 to 25 as normal, 25-30 as overweight, 30-35 as moderately obese and over 40 as severely obese. A person who is 5 foot 4 is considered obese at a weight of 174 pounds or more.... Read More: VIN