Latin America Faces a Steeper Obesity Burden Across Every Age Group
Latin America is no longer dealing with isolated pockets of excess weight. The GBD 2023 analysis shows a region-wide rise in overweight, obesity, and the downstream burden of high body-mass index from 1990 through 2023, with sharp differences by country, age group, and sex. In 2023, the signal was unmistakable: excess body weight had become a dominant population health problem rather than a secondary risk factor tucked behind other chronic diseases.
The pattern was especially stark in younger people. Among children aged 5 to 14 years, Mexico recorded the highest age-standardised prevalence of overweight and obesity at 28.4%. In adolescents and young adults aged 15 to 24 years, Chile led with 51.9%. For adults aged 25 years and older, Chile again stood at the top, with an age-standardised prevalence of 79.9%.
Adult Prevalence Has Moved Into a New Plateau of Risk
The adult numbers carry the greatest immediate clinical weight because they translate directly into future cases of diabetes, cardiovascular disease, kidney disease, and premature death. Across Latin America in 2023, an estimated 274 million adults, or 72.1%, were overweight or obese, and 127 million met criteria for obesity. Those figures are not abstract epidemiology; they represent a large at-risk population already entering primary care, emergency departments, dialysis programs, and cardiometabolic clinics.
The rise has been persistent rather than episodic. Adults in most subregions showed a yearly increase above 0.7 percentage points since 2015. Colombia experienced the fastest percentage increase in adult overweight and obesity from 1990 to 2023, climbing 68.9%. A monotonic increase in obesity prevalence ran through the full time series, which argues against a temporary fluctuation and instead points to sustained exposure to the forces driving weight gain: urbanisation, sedentary behaviour, and dietary change.
A one-sentence reality emerges from the data: the growth curve has not flattened.
The Youngest Cohorts Carry the Most Concerning Momentum
The steepest future pressure may come from the youngest cohorts, where obesity prevalence rose fastest. The analysis found a 346.3% increase in obesity prevalence among adolescents and young adults, a demographic shift with direct implications for the next two decades of health service demand. Excess weight appearing earlier in life generally means longer cumulative exposure to insulin resistance, hypertension, dyslipidaemia, and glomerular stress. It also means more years at risk for end-organ damage before people even reach midlife.
The biological sequence is familiar and unforgiving. Adipose excess promotes chronic low-grade inflammation, worsens hepatic and vascular metabolism, and accelerates atherosclerotic and renal injury. When that pathophysiology begins in adolescence, it lengthens the runway for chronic disease and makes prevention much harder to reverse later.
High BMI Already Translates Into Millions of DALYs
The burden side of the analysis was equally sobering. In 2023, 15.8 million disability-adjusted life-years were attributable to high BMI across Latin America. Mexico had the highest age-standardised DALY rate, at 3414.2 per 100,000. Those figures capture not only premature mortality but also years lived with disability from the major complications of obesity.
Diabetes mellitus, ischaemic heart disease, and chronic kidney disease were the three leading contributors to high-BMI-attributable DALY rates in both sexes. That ranking is clinically intuitive. Excess adiposity drives insulin resistance and hyperglycaemia, worsens atherogenic risk profiles, and increases intraglomerular pressure and metabolic stress on the kidney. The burden therefore concentrates in the very conditions that consume the most chronic care resources and generate the highest long-term costs.
In Argentina, Chile, Colombia, and Uruguay, age-standardised DALY rates attributable to high BMI did not show a clear increase because the uncertainty intervals included zero, even as age-standardised death rates declined. The absolute number of attributable DALYs still rose in all four countries because populations are larger and older. Fewer deaths per 100,000 do not erase the service burden when more people are living long enough to accumulate obesity-related disease.
Country Variation Points to Different Public Health Trajectories
Regional averages can obscure how sharply the epidemic has advanced in certain settings. Chile stands out repeatedly in this analysis, leading adult prevalence and ranking highest among adolescents and young adults as well. Mexico carries the highest prevalence among children and the highest DALY rate. Colombia posted the fastest growth in adult overweight and obesity over the study period. Together, those patterns suggest that Latin America is not moving along one uniform epidemiologic path; local food systems, policy environments, school health measures, urban design, and access to preventive care are likely shaping very different trajectories.
The methods strengthen confidence in the estimates. The analysis incorporated 70 new microdata sources and one new report in the GBD 2023 round, used spatiotemporal Gaussian process regression, and adjusted for self-reported data. It also disaggregated estimates by country, sex, and age group, making the burden visible across life stages rather than collapsing it into a single regional average.
Measured BMI in Children Remains a Weak Link
One of the most practical findings concerns surveillance. The investigators call for prioritising the collection of measured BMI data in children aged 5 to 14 years to improve understanding of prevalence in this age group. The request is straightforward, and the need is obvious. Self-reported or incomplete data can blur the earliest stage of a lifelong risk trajectory, when intervention may still change outcomes through school-based nutrition policy, physical activity promotion, and family-centered prevention.
The implications for health systems are immediate. Rising obesity in adolescents and young adults predicts heavier demand for diabetes care, antihypertensive treatment, renal monitoring, and cardiovascular prevention at younger ages. In countries where the burden is already highest, the clinical workload will expand long before the population reaches older age brackets.
High BMI is now among the three leading risk factors for DALYs among females in most countries in the region.
Regional Prevention Will Need to Move Earlier and Broader
This analysis makes clear that Latin America’s obesity burden is not a future threat waiting in the background. It is already embedded in adult disease patterns, and it is moving younger. The combination of rising prevalence, high DALY rates, and earlier onset leaves little room for passive responses centered only on treatment after disease develops.
Policies aimed at ultra-processed food consumption, physical inactivity, and childhood weight surveillance are not optional extras in this setting. They are the main levers available to slow the next wave of diabetes, ischemic heart disease, and chronic kidney disease. The GBD 2023 estimates do not describe a marginal shift; they describe a region in which excess body weight has become a central driver of chronic disease burden, with measurable consequences for health systems already under strain.