Young adults see fastest rise in new obesity cases
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- New obesity diagnoses in England rose nearly 20% among adults in their 30s between 2019-20 and 2024-25, and 16% among those in their 20s — the steepest increases of any age group, according to the Lancet study.
- The research team — from the University of Cambridge, British Heart Foundation Data Science Centre, and George Institute for Global Health — analyzed 55 million adult NHS patient records, excluding those already recorded as obese.
- Rates of new obesity cases actually fell in adults aged 60-79, a finding researchers attributed partly to greater use of weight-loss drugs among older patients who can afford them since NHS access is restricted.
- Earlier onset of obesity was more common in non-white groups, and areas with the highest deprivation saw steeper rises — patterns Prof Sir Michael Marmot called "further evidence" that inequalities have widened since the pandemic.
- The overall proportion of adults recorded as obese in England rose from 26.2% to 30.3% over the five-year period, even as new cases dropped in older brackets.
- Lead researcher Robert Fletcher pointed to three likely drivers: adults in their 20s and 30s grew up during a boom in unhealthy food retail, the pandemic and cost-of-living crisis hit younger families hardest, and the digital environment shapes eating habits at a "crucial moment."
Why it matters: With obesity rising 16-20% in younger adults and the overall recorded rate climbing from 26.2% to 30.3%, the NHS faces a longer pipeline of younger patients at elevated risk of diabetes, heart disease, and cancer — while the drop in new cases among 60-79 year-olds suggests privately funded weight-loss drugs are quietly reshaping who gets treatment first.
