A recent study
found that drinking coffee is associated with a longer lifespan and lower risk of death from all causes—but especially from cardiovascular disease and cancer, two of the top five causes of death.
This was an observational study, so the standard caveat applies: it doesn’t prove that coffee consumption caused the lower risk of death, it just showed an association between coffee consumption and longer lifespan.
However, there are a few reasons to believe that there may be a causal relationship:
- The results were adjusted for age, race, smoking, sex, body mass index, alcohol consumption, and other health and behavioral factors.
- The associations were similar for regular and decaf coffee and for ground and instant.
- Genetic variants that affect caffeine metabolism didn’t affect the results.
- The more coffee people consumed, the greater the protective effect, and the relationship was linear.
- Coffee is full of antioxidants and other beneficial compounds that have been shown to reduce the risk of disease and promote longevity in other studies.