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Why we need to move beyond BMI

15 min • 9 februari 2025

BMI, or body mass index, has long been used as a simple calculation to determine if someone is underweight, a ‘healthy’ weight or obese.

But when it was devised by a Belgian mathematician almost 200 years ago, it was never supposed to be a tool to measure health.

Now, researchers are challenging the way obesity is defined and diagnosed. Today, a look at the new approach and why there’s a global push away from BMI.

Featured: Willow Moscarda, Perth studentDr Louise Bauer, Professor of child and adolescent health, University of Sydney

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