In total, 337 participants died over the course of the study, but of those who remained alive for the duration, the researchers determined that participants who drank at least four cups of coffee each day had a 64 percent lower risk of mortality than participants who rarely or never drank coffee. Another U.S. -based study found that four or more cups of coffee a day led to an 18% lower risk of death, and a European study that followed half a million adults 35 years and older for 16.5 years found the more coffee a person drank, the less likely they were to have died by the end of the study. Even further, researchers also found that those 45 years or older could lower the risk of death by 30 percent for two more cups of coffee each day.
A new study claims higher coffee consumption is connected to a lower risk of death.
As well as caffeine, coffee contains antioxidants - which could be responsible for any health benefits. This new study seems to corroborate those findings by suggesting that it is indeed four-to-six daily cups of joe that made the most impact.
But it echoes findings from USA research, which have suggested three cups a day could significantly extend life.
The Hospital de Navarra's study followed almost 20,000 Spaniards over a ten-year period. "This may be due to a stronger protective association among older participants". Other studies suggest coffee consumption reduces the risk of dying from a stroke or heart disease.
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The study involved those aged between 25 and 60, with a median starting age of 37.
Professor Metin Avkiran, Associate Medical Director at the British Heart Foundation, said: "This study suggests there may be an association between drinking coffee and living longer, but it doesn't prove a causal link or explain how coffee might be having this effect".
The Spanish study was observational, so experts said it does not prove coffee was the reason for improved survival.
"Coffee drinkers should certainly not rest on their laurels. The best way to minimize your risk of cardiovascular disease and premature death is to concentrate on an overall healthy lifestyle - eat a balanced diet, stay active and don't smoke - rather than lining up the lattes".