Worldwide obesity has nearly doubled since 1980. Being obese and overweight are the fifth-leading risk for global deaths. In 2005, the United States spent an estimated $190 billion on obesity-related health care expenses. One study found in 2006 that per capita medical spending for obese individuals was an additional $1429 (42% higher) when compared with nonobese individuals. Another study concluded that over the course of a lifetime, per-person costs for obesity were similar to those for smoking.
Source: American Journal of Sports Medicine, Published online before print January 23, 2015