The study reports the prevalence of obesity in the United States among children and adults from 2011–2012. It finds that 8.1% of infants and toddlers (birth to 2 years) had high weight for recumbent length, and 16.9% of children and adolescents (2–19 years) and 34.9% of adults (age-adjusted) were obese. There was no significant change in obesity prevalence among infants and toddlers, children and adolescents, or adults between 2003–2004 and 2011–2012. However, there was a significant decrease in obesity among 2- to 5-year-olds and a significant increase among women aged 60 years and older. The study emphasizes the importance of continued surveillance due to the high prevalence of obesity. It also notes that obesity prevalence remains high, and public health efforts have focused on addressing this issue. The study uses data from the National Health and Nutrition Examination Survey (NHANES) and defines obesity based on body mass index (BMI) for adults and BMI-for-age growth charts for children. The study also discusses the limitations of BMI as a measure of body fat and the potential for different body fat levels at the same BMI across different racial and ethnic groups. The study concludes that there have been no significant changes in obesity prevalence in youth or adults between 2003–2004 and 2011–2012.The study reports the prevalence of obesity in the United States among children and adults from 2011–2012. It finds that 8.1% of infants and toddlers (birth to 2 years) had high weight for recumbent length, and 16.9% of children and adolescents (2–19 years) and 34.9% of adults (age-adjusted) were obese. There was no significant change in obesity prevalence among infants and toddlers, children and adolescents, or adults between 2003–2004 and 2011–2012. However, there was a significant decrease in obesity among 2- to 5-year-olds and a significant increase among women aged 60 years and older. The study emphasizes the importance of continued surveillance due to the high prevalence of obesity. It also notes that obesity prevalence remains high, and public health efforts have focused on addressing this issue. The study uses data from the National Health and Nutrition Examination Survey (NHANES) and defines obesity based on body mass index (BMI) for adults and BMI-for-age growth charts for children. The study also discusses the limitations of BMI as a measure of body fat and the potential for different body fat levels at the same BMI across different racial and ethnic groups. The study concludes that there have been no significant changes in obesity prevalence in youth or adults between 2003–2004 and 2011–2012.