A new UNICEF report has confirmed a global tipping point: obesity among children and adolescents has now surpassed underweight in nearly every part of the world. The only exceptions remain sub-Saharan Africa and South Asia, where malnutrition in the form of underweight persists. The agency is calling for urgent government action, warning that obese people and today’s unhealthy food environments are fueling a crisis that will burden health systems for decades.

How big is the problem?

UNICEF’s analysis, based on data from 2000 to 2022 and projections beyond, highlights a dramatic shift in child nutrition:

• 1 in 10 school-aged children and adolescents—around 188 million—are now obese.
• Obesity rates in 5–19-year-olds have more than tripled, rising from 3% in 2000 to 9.4% today.
• Underweight prevalence, while still significant, has declined from nearly 13% in 2000 to 9.2% today.

“This means malnutrition is no longer just about children being underweight,” said Catherine Russell, UNICEF’s executive director. “We are facing a double challenge.”

Where is childhood obesity most severe?

The report reveals stark differences between regions and countries:

• Pacific Island nations (e.g., Niue, Cook Islands): Nearly 40% of 5–19-year-olds are obese—the highest rates globally.
• United States and United Arab Emirates: Both report childhood obesity at 21%, among the highest outside the Pacific.
• South Asia & sub-Saharan Africa: Underweight remains more common than obesity, reflecting ongoing food insecurity.

In some wealthier nations, doctors are even turning to weight-loss drugs for teenagers, reflecting both the severity of the crisis and the difficulty of addressing it through lifestyle changes alone.

Why is obesity rising so quickly?

UNICEF points to toxic food environments as the main driver:

• Ultra-processed foods: High in sugar, salt, and fat, these products dominate global diets.
• Aggressive marketing: 75% of young people in a UNICEF poll said they saw ads for sugary drinks, snacks, or fast food in just the past week.
• Accessibility: Even in conflict-affected nations, 68% of children reported exposure to junk food advertising.

“Obesity is not a failure of parents or children,” noted Chris Van Tulleken, a global health professor at University College London and UNICEF supporter. “It’s the result of toxic food environments.”

Why does it matter?

Childhood obesity is not just a cosmetic issue. It carries lifelong health risks, including:

• Type 2 diabetes
• Cardiovascular disease
• Joint problems and mobility issues
• Mental health challenges linked to stigma and body image

The costs will ripple across societies, straining healthcare systems and reducing productivity in future generations.

What can governments do?

UNICEF is urging bold interventions, including:

• Restrictions on marketing junk food to children
• Bans on ultra-processed foods in schools
• Stronger food labeling laws
• Public health campaigns promoting healthy diets and physical activity

Without action, the agency warns, the obesity epidemic could entrench itself as the dominant form of malnutrition worldwide.

TL;DR

UNICEF reports that obesity now affects more children globally than underweight, with nearly 188 million kids aged 5–19 obese. The crisis is fueled by ultra-processed foods and relentless junk food marketing. While underweight remains a concern in South Asia and sub-Saharan Africa, obesity is now the leading malnutrition problem almost everywhere else. UNICEF is calling for urgent government action, from marketing restrictions to school food bans, to prevent a long-term global health disaster.