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The article “Impact of Healthy Lifestyle Factors on Life Expectancy and Lifetime Health Care Expenditure: Nationwide Cohort Study,” authored by Wei-Cheng Lo, Tsuey-Hwa Hu, Cheng-Yu Shih, Hsien-Ho Lin, and Jing-Shiang Hwang, explores the effects of healthy lifestyle behaviors on both life expectancy and lifetime health care costs in Taiwan. Utilizing data from the National Health Interview Survey cohort, the study investigates the impact of five key healthy lifestyle factors—nonsmoking, moderate alcohol consumption, sufficient physical activity, adequate fruit and vegetable intake, and maintaining a normal weight—on individuals’ longevity and health care expenditures. The researchers employed a rolling extrapolation algorithm with inverse probability of treatment weighting to analyze the data, revealing that adherence to these lifestyle factors significantly improves life expectancy and reduces health care costs. Their findings highlight the substantial benefits of adopting a healthy lifestyle, demonstrating that individuals who follow all five recommended behaviors enjoy longer lives and lower health care expenditures compared to those who do not.