Scientists calculate how many people suffer from obesity globally

The total number of children, adolescents and adults worldwide living with obesity has surpassed one billion, according to a global analysis published in The Lancet, Report informs referring to NewsMedical.

These trends, together with the declining prevalence of people who are underweight since 1990, make obesity the most common form of malnutrition in most countries.

The analysis of global data estimates that among the world's children and adolescents, the rate of obesity in 2022 was four times the rate in 1990. Among adults, the obesity rate more than doubled in women and nearly tripled in men. In total, 159 million children and adolescents and 879 million adults were living with obesity in 2022.

Between 1990 and 2022, the proportion of the world's children and adolescents who were affected by underweight fell by around one fifth in girls and more than one third in boys. The proportion of the world's adults who were affected by underweight more than halved over the same period.

Obesity and underweight are both forms of malnutrition and are detrimental to people's health in many ways. This latest study provides a highly detailed picture of global trends in both forms of malnutrition over the last 33 years.

The new study was conducted by the NCD Risk Factor Collaboration (NCD-RisC), in collaboration with the World Health Organization (WHO). Researchers analysed weight and height measurements from over 220 million people aged five years or older (63 million people aged five to 19 years, and 158 million aged 20 years or older), representing more than 190 countries. More than 1,500 researchers contributed to the study, which looked at body mass index (BMI) to understand how obesity and underweight have changed worldwide from 1990 to 2022.

The rise in double burden has been greatest in some low-income and middle-income countries, particularly those in Polynesia and Micronesia, the Caribbean, and the Middle East and North Africa. These countries now have higher obesity rates than many high-income industrialised countries, especially those in Europe.