39% of adults in the world are overweight or obese Globally, 39% of adults aged 18 years and older were overweight or obese in 2016. Being overweight is also defined based on body-mass index: the threshold value is lower than for obesity, with a BMI equal to or greater than 25.
To be fair, BMI is kind of a bullshit measure, but I think there is definitely an obesity epidemic and, while it is especially bad in the United States, it is global.