WHO / Conor Ashleigh
A group exercises in a small park below the Thaksin BTS station in Bangkok, Thailand.
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Controlling the global obesity epidemic

At the other end of the malnutrition scale, obesity is one of today’s most blatantly visible – yet most neglected – public health problems. Paradoxically coexisting with undernutrition, an escalating global epidemic of overweight and obesity – “globesity” – is taking over many parts of the world. If immediate action is not taken, millions will suffer from an array of serious health disorders.

Obesity is a complex condition, one with serious social and psychological dimensions, that affects virtually all age and socioeconomic groups and threatens to overwhelm both developed and developing countries. In 1995, there were an estimated 200 million obese adults worldwide and another 18 million under-five children classified as overweight. As of 2000, the number of obese adults has increased to over 300 million. Contrary to conventional wisdom, the obesity epidemic is not restricted to industrialized societies; in developing countries, it is estimated that over 115 million people suffer from obesity-related problems.

Generally, although men may have higher rates of overweight, women have higher rates of obesity. For both, obesity poses a major risk for serious diet-related noncommunicable diseases, including diabetes mellitus, cardiovascular disease, hypertension and stroke, and certain forms of cancer. Its health consequences range from increased risk of premature death to serious chronic conditions that reduce the overall quality of life.

The response: making healthy choices easy choices

WHO began sounding the alarm in the 1990s, spearheading a series of expert and technical consultations. Public awareness campaigns were also initiated to sensitize policy-makers, private sector partners, medical professionals and the public at large. Aware that obesity is predominantly a “social and environmental disease”, WHO is helping to develop strategies that will make healthy choices easier to make.

In collaboration with the University of Sydney (Australia), WHO is calculating the worldwide economic impact of overweight and obesity. It is also working with the University of Auckland (New Zealand) to analyse the impact that globalization and rapid socioeconomic transition have on nutrition and to identify the main political, socioeconomic, cultural and physical factors which promote obesogenic environments.

Our work

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Publications

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WHO acceleration plan to stop obesity

At the 75th World Health Assembly in 2022, Member States adopted new recommendations for the prevention and management of obesity and endorsed the...

Levels and trends in child malnutrition: UNICEF/WHO/World Bank Group joint child malnutrition estimates: key findings of the 2023 edition

Child malnutrition estimates for the indicators stunting, wasting, overweight and underweight describe the magnitude and patterns of under- and overnutrition...

Health service delivery framework for prevention and management of obesity

Multisectoral efforts to influence behaviours around healthy diet and exercise, while essential, have been insufficient to halt the rising prevalence of...

A primary health care approach to obesity prevention and management in children and adolescents: policy brief

Obesity in all age groups, including children and adolescents, is a public health challenge across all settings. Obesity is now classified as a complex...

Multi-sectoral impacts of the COVID-19 pandemic on nutrition outcomes: an analytical framework

This document describes the process and methodology used to develop the Analytical Framework, explains the different components and provides guidance on...

Fiscal policies to promote healthy diets: policy brief

This policy brief provides policy-makers, programme managers, health professionals and advocates with information and policy options related to the implementation...

Reformulation of food and beverage products for healthier diets: policy brief

Food reformulation is the process of altering the processing or composition of a food or beverage product, to improve its nutritional profile or to reduce...

Nutrition labelling: policy brief

This policy brief provides policymakers, programme managers, health professionals and advocates with information and options for nutrition labelling policies,...