At 11 years old, Warin* a 5th-grader from Bangkok, weighs 74kg and stands 153cm tall. Like many children struggling with obesity, her daily life is marked by fatigue, joint pain and the constant sense of being different from her peers.
"I don't like being bigger than other kids," Warin said. "Friends tease me often, saying I'm too big. It makes me feel uncomfortable… and I get tired easily when I have to run or play with them."
Warin's struggle with weight began early. By age six, she had developed a strong craving for snacks like chips and fried chicken, while rarely touching vegetables. At school, even though the cafeteria serves balanced lunches, she often feels hungry after and drifts towards shops selling sweets, pancakes, cakes and fried snacks.
"Every day, after lunch, I go and buy snacks. There are so many shops inside the school selling all kinds of food like pancakes, cakes, fried chicken, French fries and fish balls," she said.
At home, the pattern continues. She eats dinner with her family, but snacks soon follow. Her mother described her as having a "screen-snacking habit", often eating more than three packs of crisps while playing games for hours at night. Lately, the family has stopped buying crisps and stocked the fridge with fruit, hoping to help Warin break the habit.
"The hardest thing is the environment," her mother said. "We can try to control what's in the house but once she's at school or outside, it's impossible to watch her all the time. Asking a child to resist that temptation alone is very difficult."
Her parents are concerned about her health. Warin snores at night, which can affect the flow of oxygen to her brain and she often tires easily. Last year, she attended a short camp for overweight children where she learned to read food labels and follow a 2:1:1 eating model of vegetables, rice and protein. Unfortunately, the lessons quickly faded after she returned home. The family has consulted a doctor about her weight and plans to follow up again.
Warin's story is far from unique. Childhood obesity is one of the fastest-growing health crises in Thailand and around the world. According to Unicef's new report Feeding Profit: How Environment Is Failing Children, there are now more obese children than underweight children worldwide for the first time. Some 188 million school-age children and adolescents can be classed as obese.
In Thailand, the number of overweight and obese children has doubled in the past 25 years, placing the country among the top four in Asean. According to the National Statistical Office in 2021, 43% of Thai adolescents consumed fast food at least four times a week. The World Obesity Federation warns that if this trend continues, more than 60% of Thai children could be obese by 2035.
The consequences can be devastating. Overweight children are more likely to develop diabetes, high blood pressure and heart disease. Many struggle with joint and bone problems, poor sleep and psychological challenges such as stress, bullying and low self-esteem. The economic impact is also alarming: obesity is estimated to cost Thailand around US$8 billion (259.4 billion baht) annually, a figure projected to rise to $21 billion by 2030.
Experts say the issue goes beyond individual choices. Over the past 15 years, convenience stores and hypermarkets have grown rapidly, processed food sales have risen 70% per person and online fast-food delivery has surged more than 650% since 2013. These shifts in the food environment make it increasingly difficult for children to make healthy choices.
"Children often don't choose what they eat, food environments choose for them," said Sirirath Chunnasart, Unicef Thailand's Adolescent Development Specialist. "If we want healthier generations, we need to change the environment around them, not just tell them to eat better."
Some schools, however, are taking the issue seriously. Bangkok Christian College, one of Thailand's oldest private schools, has introduced a range of policies to promote healthier eating over the past several years. Sodas are banned and all beverages sold at the school must contain no more than 10% sugar. Sugar has also been removed from condiments in the cafeteria. Nutritionists help design balanced menus and parents are involved in the food selection process.
Colourful posters in the cafeteria remind students to "eat less sweet, oily and salty foods and add more fruits and vegetables", while staircases are marked with calorie counts to encourage physical activity.
"What we have observed is that overweight children often struggle with concentration in class and experience physical fatigue," said Waraporn Subsomboon, the school's principal. "But after making changes, we've seen improvements. Students are more focused in their studies, their weight has gone down, they've learned to make healthier food choices and understand what is good for them and what they should avoid. Socially, they have also become more confident."
The Ministry of Public Health recently recognised Bangkok Christian College as a Model School For Good Nutrition Practice 2025, highlighting its efforts to promote healthier eating habits among students and setting an example for other schools nationwide.
At the national level, Thailand has introduced a sugar tax on sweetened beverages, which has already reduced sugar levels in drinks by around 10%. The Ministry of Public Health is also advancing legislation to regulate the marketing of unhealthy foods and drinks to children, in line with the World Health Organization's recommendations.
Currently, Unicef Thailand is supporting the Bureau of Nutrition and other stakeholders such as the NCD Alliance in advocating for the enactment of the Draft Act On The Marketing Of Food And Beverages Affecting Children's Health, while also engaging young people and parents through the Kin Rai Dee (What's Good To Eat) campaign. The campaign promotes simple daily habits like reading nutrition labels, choosing balanced meals and reducing junk food consumption, targeting Gen Z and parents of young children to make healthier food choices.
For Warin, she hopes to run alongside her friends without feeling out of breath and has recently shown an interest in boxing as a way to get active again. It may be a small step, but with the right support, it could be the start of a journey towards a healthier life.
"I want to learn boxing, give it a try, and see how it goes," Warin added. "It feels like a good way to use my energy."
To experts like Sirirath, childhood obesity is not just a health issue, it is about children's right to grow, learn and thrive.
"The scale of the problem requires serious commitment and collaboration between government bodies, schools, businesses, families and children themselves. That's the only way we will create healthier food environments and ensure that nutritious choices are affordable and accessible," Sirirath said. "If the law passes, children like Warin will have a real chance to succeed, not only in managing their health, but in reaching their full potential."
* Not her real name
Originally published on The Bangkok Post on 4 October 2025
