Trends in Metabolic Traits Across Obesity and Normal BMI Cohorts in Industrialized Nations

Article Impact Level: HIGH
Data Quality: STRONG
Summary of  The Lancet, https://doi.org/10.1016/S0140-6736(26)00758-0 
Dr. Mo Goodarzi et al.

Points

Imperial College London researchers analyzed 110 population-based health data sets containing almost 1 million participants to evaluate long-term trends in blood pressure and non-HDL cholesterol.
Long-term tracking from 1990 to 2024 across seven high-income nations revealed that blood pressure and unhealthy cholesterol levels fell more steeply among older adults living with obesity.
Pharmaceutical data showed that approximately 70 to 72 percent of older men with severe obesity were prescribed lipid-lowering medication compared to under half of normal-weight men.
Regional variations emerged during the multi-decade study because the metabolic risk convergence between the different body mass index cohorts was not observed as universally in Taiwan or Thailand.
Adults under forty years of age exhibited little to no narrowing of the metabolic gap, indicating that younger populations remain at higher cardiovascular risk and require early clinical screening.

Summary

Investigating the evolving metabolic profiles of adults with excess adiposity, this multi-country study analyzed secular trends in blood pressure and non-HDL cholesterol levels relative to body mass index (BMI). Obesity is historically associated with marked elevations in cardiotoxic lipid fractions and systemic vascular tension, both of which accelerate ischemic heart disease and cerebrovascular accidents. The research sought to determine whether the disparity in these primary cardiovascular risk markers between individuals with obesity and those with a normal BMI narrowed from 1990 to 2024, evaluating the contribution of targeted pharmacological interventions across different age cohorts.

Using data compiled from 110 population-based health data sets, investigators tracked an aggregate sample of almost 1 million participants aged 40 to 79 across seven high-income nations: England, the United States, Japan, South Korea, Taiwan, Thailand, and Finland. Longitudinal analysis revealed a distinct convergence of risk factors over the three-decade observation period, with blood pressure and non-HDL cholesterol dropping more steeply among older adults with obesity than in their normal-weight counterparts. By the early 2020s, in England and the United States, around 70% to 72% of older men with severe obesity ($\text{BMI} \ge 35$) were utilizing lipid-lowering therapies compared with only 40% to 48% of men with a normal BMI, directly driving down metabolic differentials.

Heterogeneity was observed across geographic and age cohorts, with Taiwan and Thailand exhibiting less universal risk convergence. Furthermore, younger adults aged under 40 with obesity experienced no significant narrowing of the metabolic gap, correlating with low baseline utilization rates of antihypertensive and statin therapies. These findings suggest that while intensive medical management has successfully mitigated specific cardiovascular risk factors in older populations with obesity, younger cohorts remain metabolically vulnerable, underscoring the necessity of integrated preventive strategies that combine early screening with lifestyle modifications alongside contemporary anti-obesity medications.

Link to the article: https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(26)00758-0/fulltext

References

Goodarzi, MO, Metabolic traits in obesity and normal BMI in industrialised countries: A multi-country analysis of national population-based studies. (2026). The Lancet, S0140673626007580. https://doi.org/10.1016/S0140-6736(26)00758-0