Viet Nam ranks among the countries with the lowest adult obesity rates in the world. According to Viet Nam's nutrition profile published in the Global Nutrition Report 2023, the prevalence of obesity stands at around 3.3 percent among adult women and 2.2 percent among adult men. These figures are well below the regional averages of 10.3 percent for women and 7.5 percent for men.
These low rates are largely attributed to a combination of a traditional diet centered on fresh ingredients and high levels of daily physical activity. However, the same foundations are gradually eroding, with the fastest reversal occurring among children, particularly in major cities, as Viet Nam undergoes rapid economic modernization.
A Diet Still Centered on Fresh Ingredients
Viet Nam's traditional diet revolves around rice, complemented by a wide variety of vegetables, lean protein from fish and poultry, and fermented foods, typically served in relatively modest portions.
Research published in Maternal & Child Nutrition found that dietary habits, including portion control and meal composition, are associated with the prevalence of overweight in rural areas.
One important distinguishing factor is the relatively limited market share of ultra-processed foods, such as instant noodles, packaged snacks, and sugar-sweetened beverages, which have been linked to a higher risk of obesity, diabetes, and cardiovascular disease.
In Viet Nam, the consumption of ultra-processed foods has been growing, particularly in urban centers. However, according to an analysis published by Eurasia Review in 2025, the country's diet remains largely based on fresh foods. Traditional open-air markets continue to dominate outside major cities, even as supermarkets and convenience stores continue to expand.
Physical Activity That Long Served as a Protective Factor
Daily physical activity has long been one of the main reasons behind Viet Nam's low obesity rates. The country's first national study on physical activity, which measured data from 2009 and was published in 2015, found that 72.9 percent of men and 69.1 percent of women met the World Health Organization (WHO) recommendations for physical activity in their respective age groups.
The same pattern persisted in subsequent surveys. The National Survey on Risk Factors of Non-Communicable Diseases (STEPS), conducted in 2015 and summarized in a 2022 report, found that 84.1 percent of adults aged 18 to 69 achieved a high level of physical activity, defined as at least 1,500 MET-minutes per week.
Most of this activity did not come from recreational exercise but from work, particularly farming and manual labor, which remain more common in rural areas. Rural residents were significantly more likely than urban residents to engage in vigorous physical activity.
However, because these high activity levels were closely tied to physically demanding occupations and rural lifestyles, the ongoing shift toward urban living and more sedentary jobs has steadily eroded this advantage.
The Fastest Reversal Is Happening Among Children
The clearest sign that Viet Nam's advantage is fading can be seen among children. According to data from the National Institute of Nutrition summarized in a 2023 analysis, the prevalence of overweight and obesity among children aged 5 to 19 more than doubled, rising from 8.5 percent in 2010 to 19 percent in 2020.
Major cities bear the greatest burden. The same 2020 survey found that the prevalence reached 26.8 percent in urban areas, compared with 18.3 percent in rural areas. In Ho Chi Minh City, more than half of urban children and adolescents were overweight or obese, while in Hanoi the figure exceeded 41 percent.
The pattern across income groups has also reversed. Earlier evidence suggested that children from higher-income households faced the greatest risk of obesity. However, an analysis published in 2024 found that children from lower-income households are now more likely to be obese.
The Economic Pressures Behind the Low Numbers
This shift has occurred alongside Viet Nam's rapid economic growth. According to World Bank data, Viet Nam's economy expanded by 7.1 percent in 2024, one of the fastest growth rates in the region. Rising household incomes have altered consumption patterns, leading to greater consumption of animal products, fats, sugar, and convenience foods.
The cost of a healthy diet in Viet Nam was estimated at 3.08 international dollars during the 2016–2020 period. If the cost of healthy foods continues to rise faster than household incomes, families may increasingly turn to cheaper, calorie-dense foods, a common pathway to multiple forms of malnutrition.
