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Association between coffee consumption and life expectancy: a prospective cohort study from NHANES 2001-2018
Guangcan Yan1,2, Xiaoqi Dai3, Yun Yan4
1School of Public Health, Harbin Medical University, Harbin, People's Republic of China.
Public Health Nutrition
|August 22, 2025
Summary
Drinking moderate amounts of coffee, around two cups daily, is linked to a longer life expectancy in US adults. This coffee consumption may contribute to increased longevity and reduced mortality from cardiovascular disease.
Area of Science:
- Epidemiology
- Public Health
- Nutritional Science
Background:
- Coffee is a widely consumed beverage globally.
- Previous studies have suggested potential health benefits of coffee consumption.
- The association between coffee intake and long-term mortality remains an area of active research.
Purpose of the Study:
- To investigate the relationship between coffee consumption and life expectancy in a large, nationally representative sample of US adults.
- To quantify the impact of different levels of coffee intake on overall survival and cause-specific mortality.
Main Methods:
- A prospective cohort study design was employed.
- Data from 43,114 US adults aged 20+ were analyzed from the National Health and Nutrition Examination Survey (2001-2018).
- Life expectancy and mortality (total, cardiovascular disease, cancer) were assessed based on self-reported coffee consumption.
Main Results:
- Coffee consumption was associated with increased life expectancy.
- Individuals drinking 1 to 2 cups of coffee per day experienced an average gain of 2.02 years in life expectancy compared to non-drinkers.
- This benefit was partly attributed to a significant reduction in cardiovascular disease (CVD) deaths.
Conclusions:
- Moderate coffee consumption (approximately 2 cups/day) is associated with enhanced life expectancy.
- Coffee may be a beneficial dietary component for increasing longevity.
- Recommending moderate coffee intake could be an effective public health intervention.
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