According to the Centers for Disease Control and Prevention (CDC), approximately 42.4% of American adults age 20 and older were obese as of the 2017 to 2018 biennial period, up from 39.6% during the 2015 to 2016 period. From 1999–2000 through 2017–2018, the prevalence of obesity rose from 30.5% to 42.4%. Obesity is defined as a body mass index (BMI) (weight in kilograms, divided by height in meters squared) of greater than, or equal to 30. A subset of people with obesity have severe obesity, which is defined as a BMI of greater than . . .
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