Time to tackle obesogenic environments

March 4th is World Obesity Day, a unified day of action calling for a response to the obesity crisis. Obesity is one of the most concerning public health crises globally. According to WHO, since 1990, obesity has more than doubled in adults and quadrupled in adolescents. In 2022, 2·5 billion adults had overweight, including 890 million with obesity, and 390 million children and adolescents aged 5–19 years had overweight, including 160 million with obesity. Overweight and obesity are associated with other major chronic diseases such as type 2 diabetes, coronary heart disease, stroke, hypertension, and cancer. 1·9 billion people are projected to be living with obesity by 2035, including a doubling of childhood obesity from 2020 levels by 2035. Urgent response and action by stakeholders needs to be prioritised to prevent this worsening health crisis.