Context: New cases of obesity in England are rising fastest among younger adults, with rates of new diagnoses for people in their 30s nearly 20% higher in 2024-25 than in 2019-20, and 16% higher for those in their 20s. The trend is concerning because obesity increases the risk of illnesses such as diabetes, heart disease, and cancer. Researchers analyzed 55 million adult NHS patient records to identify who was being diagnosed with obesity.