https://www.sciencedaily.com/releases/2025/06/250617014142.htm
- June 17, 2025
- Tufts University
- Coffee might be doing more than fueling your morning routine it could be extending your life. A large-scale study by Tufts University suggests that drinking one to three cups of caffeinated coffee daily is associated with lower overall mortality, particularly from cardiovascular causes. But there s a catch: the benefits drop when sugar and saturated fats like cream are added in excess.
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Writing in The Journal of Nutrition, researchers from Tufts University said they looked at the coffee-drinking habits of 46,332 Americans between 1999 and 2018, when they were part of the U.S. government’s National Health and Nutrition Examination Survey.
They had three big findings:
- First, drinking one cup of coffee per day was linked to a 16% lower risk of death for any of the participants over the study period, from any cause.
- Next, drinking more coffee was linked to an even slightly better result; for example, study participants who drank 2-3 cups per day had a 17% lower risk of “all-cause mortality.”
- Finally, the benefit only applied to black coffee.
A few examples:
- A 2018 study, entitled “Association of Coffee Drinking With Mortality by Genetic Variation in Caffeine Metabolism,” found that drinking coffee during a 10-year study period led to between 10% and 15% less likelihood of all-cause mortality.
- Another study took the “drink even more coffee” benefits to an extreme, suggesting that people who drank “at least four cups of coffee per day” had a 64% lower risk of “all-cause mortality than those who never or almost never consumed coffee.”
- And, a 2022 study of 171,616 people in the U.K. found that drinking between 1.5 and 3.5 cups of coffee daily was linked to a 30% reduced chance of dying from any cause during the seven-year study period.
