World health organization

10 facts on obesity

Chart displaying BMI classification
WHO

Overweight and obesity are defined as "abnormal or excessive fat accumulation that may impair health"

Body mass index (BMI) – the weight in kilograms divided by the square of the height in meters (kg/m2) – is a commonly used index to classify overweight and obesity in adults. WHO defines overweight as a BMI equal to or more than 25, and obesity as a BMI equal to or more than 30.

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