Obesity is a growing problem in many OECD countries.
The OECD is an international organization that works with more than 100 countries to develop knowledge, analysis, and policy solutions aimed at creating stronger, fairer, and more sustainable societies.
According to a new study presented at the annual European Congress on Obesity (ECO 2026) and reported by News-Medical, the United States had the highest obesity rate in 2022, while Japan had the lowest.
Researchers examined data from 33 OECD countries between 1990 and 2022. The figures came from sources including the OECD, the WHO, and the World Bank.
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The researchers found major differences between countries.
Several Latin American countries had higher obesity rates than a number of European countries, even though they consumed less fat and fewer calories on average.
More than diet
The study suggests that obesity is not only about food and exercise. Working conditions and economic factors may also play a major role.
According to the researchers, long working hours can lead to less time for exercise, higher stress levels, and a greater reliance on fast food and unhealthy meals.
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At the same time, the analysis showed that higher income is often associated with lower obesity rates.
Fewer working hours
The results showed that fewer working hours were linked to lower obesity rates. If working hours decreased by 1 percent, obesity rates fell by an average of 0.16 percent.
The connection was strongest among men. Researchers therefore believe that a better work-life balance may be important for public health.
Sources: News-Medical and European Congress on Obesity 2026.
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