Children with Obesity Now Outnumber Underweight for First Time Worldwid

The tide has turned in the global fight against malnutrition, with a new UNICEF report showing that for the first time, the number of obese children worldwide has surpassed those who are underweight. Among school-aged children and adolescents, 188 million are now classified as obese, according to data spanning more than 190 countries. This marks a significant shift since the year 2000, when rates of childhood obesity were far lower and underweight children made up nearly 13 per cent of the global population. That figure has since dropped to 9.2 per cent, while global obesity rates have climbed from just 3 per cent to an alarming 9.4 per cent.

Regional disparities abound. In all areas except sub-Saharan Africa and South Asia, obesity rates among young people now eclipse those of underweight. Pacific nations stand out, with places such as Niue, the Cook Islands and Nauru seeing as many as 38 per cent, 37 per cent and 33 per cent of five to nineteen-year-olds living with obesity, respectively. The United Kingdom faces its own challenges, with one in seven children aged between two and fifteen found to be obese according to the latest NHS England data from 2022.

The shift is not being driven solely by individual choices, the UNICEF study argues, but by systemic issues with increasingly unhealthy food environments. Ultra-processed foods and fast food have become mainstays in shops and schools, displacing fruits, vegetables and quality protein sources. This dietary trend raises the risk of long-term health problems, including insulin resistance, high blood pressure, and type 2 diabetes.

The financial stakes are considerable. UNICEF predicts the annual global cost of childhood obesity could reach $4 trillion by 2035, adding a serious economic dimension to what has traditionally been perceived as a health issue alone. The challenge is compounded by the so-called “double burden” of malnutrition, where stunting and obesity coexist within the same populations, even sometimes in the same individuals.

UNICEF calls for urgent policy interventions: the implementation of mandatory food marketing restrictions, improved food labelling and the introduction of levies on unhealthy foods. There is strong advocacy for banning ultra-processed and junk foods in schools, as well as supporting behaviour change initiatives to help families access and choose healthier, more nutritious foods. These measures could start to reverse current trends and relieve the mounting economic pressures linked to poor childhood nutrition.

The message from global health bodies is clear—without fundamental changes to food policy and access, childhood obesity will only increase, burdening societies and economies alike for generations to come.