For years, medical experts have defined obesity primarily based on body mass index, which measures stored fat by calculating height and weight, to determine a person’s health risks. Major public ...

New obesity criteria that add waist and body fat measures to BMI could classify nearly 70% of U.S. adults as obese, according to a new study.

A new definition of obesity could classify more than three-quarters of US adults as having the disease, impacting the ...

The adoption of the new “clinical obesity” definition alters prevalence estimates of obesity in many parts of the world compared with BMI-based definitions, new data suggested. In January 2025, a ...

New criteria for obesity are putting more Americans into that category. In early 2025, the Lancet Diabetes and Endocrinology Commission proposed a major update to how obesity is defined. Researchers ...