Longevity & AgingNormal BMI Doesn't Mean You're Safe from Obesity's Health Risks
A major national study found that more than one in four U.S. adults with a normal BMI actually meet new clinical obesity criteria developed by the Lancet Diabetes and Endocrinology commission. The new framework goes beyond BMI by requiring at least one additional body measurement — like waist circumference or waist-to-height ratio — plus evidence of organ or physical dysfunction. When researchers applied this broader definition, obesity prevalence nearly doubled compared to BMI-only assessments. This matters because excess body fat, even in lean-looking individuals, can silently drive hypertension, joint problems, chronic fatigue, and other conditions. The findings suggest millions of Americans may be missing critical health interventions simply because their BMI looks normal.
