This supplementary appendix accompanies the article "Air pollution exposure and cardiometabolic risk" published in The Lancet Diabetes & Endocrinology. It includes two tables and references. Appendix Table 1 presents associations between air pollution and insulin resistance, including metrics such as black carbon, heart rate variability, and blood pressure. Appendix Table 2 covers air pollution's impact on diabetes incidence, mortality, and obesity, with metrics like risk ratio, hazard ratio, and 2-hour post-meal plasma glucose. The references list 25 studies investigating the relationship between air pollution and cardiometabolic health, including insulin resistance, diabetes, obesity, and metabolic syndrome. The studies span various populations and regions, with a focus on long-term and short-term exposure effects. Key findings include increased insulin resistance and diabetes risk with air pollution exposure, particularly fine particulate matter (PM2.5) and ozone. The research highlights the need for further investigation into the mechanisms linking air pollution to cardiometabolic diseases. The appendix is peer-reviewed and provided as supplied by the authors.This supplementary appendix accompanies the article "Air pollution exposure and cardiometabolic risk" published in The Lancet Diabetes & Endocrinology. It includes two tables and references. Appendix Table 1 presents associations between air pollution and insulin resistance, including metrics such as black carbon, heart rate variability, and blood pressure. Appendix Table 2 covers air pollution's impact on diabetes incidence, mortality, and obesity, with metrics like risk ratio, hazard ratio, and 2-hour post-meal plasma glucose. The references list 25 studies investigating the relationship between air pollution and cardiometabolic health, including insulin resistance, diabetes, obesity, and metabolic syndrome. The studies span various populations and regions, with a focus on long-term and short-term exposure effects. Key findings include increased insulin resistance and diabetes risk with air pollution exposure, particularly fine particulate matter (PM2.5) and ozone. The research highlights the need for further investigation into the mechanisms linking air pollution to cardiometabolic diseases. The appendix is peer-reviewed and provided as supplied by the authors.