Why the Lancet Commission is calling for a shift beyond BMI to diagnose obesity

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By Sumit Jha

Jan 16, 2025

For years, doctors have used Body Mass Index (BMI) to measure body fat and figure out health risks related to obesity.

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Now, a global group of experts, supported by over 75 medical organisations and published in The Lancet Diabetes & Endocrinology, is suggesting a new and improved way to diagnose obesity.

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This method looks at more than just BMI—it includes other ways to measure body fat and checks for clear signs of health problems in each person.

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This approach aims to fix problems with the old way of defining and diagnosing obesity, which often left people without the care they needed.

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The experts also hope their new system will help settle the heated debate about whether obesity should be considered a disease—a topic that has divided opinions in modern medicine for years.

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With over one billion people worldwide now living with obesity, the Lancet Commission suggests a new approach. 

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It proposes a clear, universal way to define and diagnose obesity that focuses on individual health and provides better support through healthcare systems globally.

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