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Obesity myths vs facts

Six common ideas about obesity, checked against real data from WHO, the UN and the US CDC.

❌ Myth: Obesity is only a problem in rich countries.

βœ… Fact: In 2024, 16.7% of adults in upper-middle-income countries and 12.0% in lower-middle-income countries lived with obesity, compared with 24.7% in high-income countries (WHO).

❌ Myth: Obesity only affects adults.

βœ… Fact: Among 5–19-year-olds worldwide it went from 1.1% in 1980 to 8.2% in 2024 (WHO).

❌ Myth: A country has either hunger or obesity β€” not both.

βœ… Fact: Undernutrition and obesity often exist side by side β€” in the same country, the same community and even the same household. (WHO)

❌ Myth: It has always been this common.

βœ… Fact: When the US first measured adults in 1959–1962, 13.4% of 20–74-year-olds had obesity. In Aug 2021–Aug 2023 it was 40.8% (CDC surveys, our calculation).

❌ Myth: BMI tells you exactly how much body fat you have.

βœ… Fact: BMI cannot tell fat from muscle and bone, and it doesn’t show what type of fat someone has or where it sits in the body. (CDC)

❌ Myth: What people report about their weight is as accurate as measuring it.

βœ… Fact: In the US, self-reported surveys give lower obesity figures than measured ones β€” see how data is collected.

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Written by the ObesitySurvey team. Not medical advice.

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