Some Rich Nations Finally Slow Obesity Rates

After 45 years of relentless increases, obesity rates are finally slowing in wealthy countries, offering hope that the trend can be reversed with the right tools.

A new study tracking 232 million people across 200 countries found that obesity rates have plateaued in most high-income nations. In France, Italy, and Portugal, rates might even be dropping, though researchers say it's too early to call it a lasting change.

The findings challenge the idea that rising obesity is unstoppable everywhere. While rates continue climbing in most low and middle-income countries, the slowdown in wealthier nations proves progress is possible.

"The rise is not inevitable," says Majid Ezzati, who led the study at Imperial College London. His team tracked body mass index data from 1980 through 2024, revealing dramatically different paths between rich and poor countries.

The U.S. shows mixed results. Obesity rates have plateaued in children and teens but keep climbing in adults, though more slowly than before. Still, American obesity rates rank highest among wealthy Western nations, affecting 40 to 43 percent of adults compared to just 4 to 8 percent in Japan.

The reasons behind these differences point to hopeful solutions. Countries where obesity slowed made it easier for people to choose healthy options. Better nutrition knowledge, year-round access to fresh fruits and vegetables, and support from institutions helped people make better choices.

Meanwhile, places where obesity accelerated saw rapid shifts away from traditional diets rich in whole grains and vegetables toward processed foods packed with sugar, salt, and unhealthy fats. Urban sprawl eliminated safe spaces for walking and playing.

The Bright Side

The leveling off in wealthy nations happened before weight-loss medications became widely available, meaning the changes came from prevention efforts and better food environments. That's encouraging news because it shows communities can create conditions where healthy living becomes easier.

Jennifer Baker, president-elect of the European Association for the Study of Obesity, emphasized that prevention remains crucial even as new medications emerge. "We don't lose sight of the importance of prevention," she said.

The research reveals something powerful: countries with similar wealth and technology are seeing very different outcomes. That diversity suggests the solutions are within reach, waiting to be understood and shared.

Future research will explore what's working in countries that slowed obesity rates and whether weight-loss medications will accelerate the positive trends. For now, the data offers concrete proof that turning the tide is possible when communities commit to change.