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Body mass index = weight (kg) / height (m)². Overweight: 25-29.9. Obese: ≥30. FDA threshold for Wegovy/Zepbound: BMI ≥30, or ≥27 with weight-related condition.
BMI is calculated as weight (kg) divided by height (m) squared. Categories: underweight <18.5, normal 18.5-24.9, overweight 25-29.9, obesity ≥30. FDA-approved weight-loss GLP-1s require BMI ≥30, or ≥27 with at least one weight-related comorbidity (hypertension, T2D, dyslipidemia). BMI is criticized for not distinguishing muscle from fat but remains the regulatory eligibility metric.