According to a 2007 report from the Milken Institute, obesity contributes to a loss of workplace productivity that costs what percentage of GDP?
The 2007 Milken report states that workplace productivity has taken a hit from obese employees, who take more sick days or under perform by working while sick. The report goes on to claim that obese employees cost their employers $257 billion annually, which adds up to 1.8% of GDP.
SOURCE: An Unhealthy America: The Economic Burden of Chronic Disease -- Charting a New Course to Save Lives and Increase Productivity and Economic Growth | Milken Institute