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Beyond BMI: A More Complete View of Obesity

Move from size alone toward adiposity, fat distribution, function, and health impact.

Clinical takeaway

BMI remains a useful screening tool, but diagnosis and treatment planning improve when clinicians also assess abdominal adiposity, comorbidity, and functional impact.

What BMI misses

  • BMI does not distinguish fat from muscle.
  • Visceral and ectopic fat are more closely linked to cardiometabolic risk.
  • A person with a 'normal' BMI can still carry clinically important adiposity.

A simple additional measure

Waist-to-height ratio adds a practical marker of abdominal adiposity. A ratio above 0.50 suggests increased cardiometabolic risk and should be interpreted alongside BMI, comorbidities, physical function, and the broader clinical assessment.

A practical pathway

  • Screen with BMI, waist circumference, and waist-to-height ratio.
  • Stratify cardiometabolic and functional risk.
  • Personalize lifestyle and pharmacologic care.
  • Track metabolic markers and health impact, not weight alone.

References

  1. Wilding JPH, et al. Nat Rev Endocrinol. 2026;22:453-470.
  2. Busetto L, et al. Nat Med. 2024;30:2395-2399.

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