Obesity rates among children and adolescents set to soar by 2050

A staggering rise in childhood and adolescent obesity is anticipated over the next 25 years, with one in six young people worldwide predicted to be living with obesity by 2050. A newly published study warns that without immediate intervention, this escalating public health crisis could place immense strain on healthcare systems and economies across the globe.

The research, conducted by the Murdoch Children’s Research Institute (MCRI) and published in The Lancet, estimates that by 2050, 385 million children and adolescents will be categorised as overweight, while a further 360 million will have obesity. This projection encompasses 356 million children aged 5–14 years and 390 million individuals aged 15–24 years, highlighting the pervasiveness of the issue across developmental stages.

The Alarming Acceleration of Obesity Rates

Between 1990 and 2021, the global obesity rate among young people aged 5–24 years more than tripled, increasing by a shocking 244% to reach 174 million. The researchers argue that such a dramatic rise demonstrates the failure of current interventions to curb the trend, leaving an entire generation vulnerable to long-term health complications. By 2021, an estimated 493 million children and adolescents worldwide were classified as overweight or obese, underscoring the magnitude of the crisis.

Dr Jessica Kerr, a researcher at MCRI, emphasised the urgency of immediate action, stating that failing to implement effective five-year intervention strategies could lead to dire consequences for future generations.

“Children and adolescents remain a vulnerable population within the obesity epidemic. Prevention is key as obesity rarely resolves after adolescence.

This giant burden will not only cost the health system and the economy billions, but complications associated with a high Body Mass Index (BMI), including diabetes, cancer, heart problems, breathing issues, fertility problems and mental health challenges, will negatively impact our children and adolescents now and into the future, even holding the potential to impact our grandchildren’s risk of obesity and quality of life for decades to come.

Despite these findings indicating monumental societal failures and a lack of coordinated global action across the entire developmental window to reduce obesity, our results provide optimism that this trajectory can be avoided if action comes before 2030.”

Global Trends and High-Risk Regions

The study, released in conjunction with World Obesity Day, utilised data from the 2021 Global Burden of Diseases, Injuries, and Risk Factors Study, led by the Institute for Health Metrics and Evaluation. The analysis included forecasts for 204 countries and territories, identifying key regions where obesity prevalence is expected to be particularly severe.

The United Arab Emirates, Cook Islands, Nauru, and Tonga are projected to have the highest obesity prevalence by 2050, while China, Egypt, India, and the United States are expected to have the largest absolute numbers of children and adolescents with obesity.

Australia has been identified as one of the countries experiencing the fastest transitions to obesity among young people. The study highlights a concerning trend in which Australian girls are already more likely to have obesity than be overweight. By 2050, it is projected that 2.2 million Australians aged 5–24 years will have obesity, with an additional 1.6 million classified as overweight.

Globally, the research indicates a shift where boys aged 5–14 years will be more likely to have obesity than be overweight by mid-century, demonstrating an accelerating trend in early childhood.

Urgent Policy Action Required to Prevent a Public Health Emergency

Dr Kerr warned that without significant policy reforms, regions such as North Africa, the Middle East, Latin America, and the Caribbean could experience the most rapid increases in obesity rates due to their high population growth and limited healthcare resources.

“Without urgent policy reform, the transition to obesity will be particularly rapid in North Africa, the Middle East, Latin America and in the Caribbean, where the rise is concurrent with high population numbers and limited resources.

Many regions have historically had to focus on preventing undernutrition and stunting in children. To prevent a public health emergency from this newer threat, an immediate imperative should be creating national surveillance surveys of obesity in children and adolescents in every country.”

The study identifies adolescent girls aged 15–24 years as a particularly vulnerable group, given their entry into reproductive years and the potential for intergenerational transmission of obesity-related health risks.

“Adolescent girls who have obesity are a main focus if we are to avoid intergenerational transmission of obesity, chronic conditions and the dire financial and societal costs across future generations.

With this age group increasingly being out of school and cared for by adult services, we need to focus interventions at the community and commercial level.”

The Role of Governments and Environmental Interventions

Professor Susan Sawyer, also of MCRI, emphasised the need for governments to adopt comprehensive strategies that address obesity drivers beyond individual behaviours, encompassing food environments, physical activity, urban planning, and public health policies.

“While people and families can work to balance their physical activity, diet and sleep, everything in our environments works to counteract these efforts.

Given this huge global shift in children’s and adolescents’ weight, we can no longer keep blaming people for their choices. We require governments to step up by addressing regulatory interventions including taxing sugar-sweetened beverages, banning junk food advertising aimed at children and young people and funding healthy meals in primary and secondary schools. We also need to consider the benefits of wider policies such as overhauling urban planning to encourage active lifestyles.”

The Path Forward

This research presents a stark warning about the future of global childhood and adolescent obesity rates but also provides a glimmer of hope that targeted, immediate action could alter the projected trajectory. The findings reinforce the need for urgent, evidence-based interventions at both national and global levels, with a focus on preventing obesity from early childhood through adolescence. By enacting systemic changes, policymakers and public health experts have the opportunity to mitigate the long-term health and economic burdens of obesity, ultimately improving the lives of millions of young people worldwide.