Researchers have found that regular consumption of coffee can reduce the risk of death as a result of a variety of causes such as diabetes and heart diseases, compared to those did not consume coffee during the 10-year study.
Dr Erikka Loftfield with the National Cancer Institute-Maryland said, "There are numerous biologically active compounds, including phenolic acids, potassium, and caffeine contained within coffee."
The researchers used data from a previous study that included 90,317 adults without cancer or history of heart disease. The participants were followed from 1998 through 2009. At the beginning of the study, they had reported their coffee intake, along with other dietary and health details.
The risk of death was lowest for those who drank up to four or five cups of coffee per day. According to the results published in the American Journal of Epidemiology, a similar association was seen among people who drank decaffeinated coffee as well.
The researchers found that coffee drinkers had a reduced risk of death from heart disease, chronic respiratory disease, influenza, pneumonia, and suicide, but not cancer.
"Although coffee drinking has also been inversely associated with the incidence of certain cancers, like liver, in epidemiological studies, we did not observe an association between coffee and overall cancer mortality. This may be because coffee reduces mortality risk for some cancers but not others," said Loftfield.
"People who consumed two to three cups of coffee per day had approximately an 18 percent lower risk death during follow-up compared to those who reported drinking no coffee," she said.
Drinking up to five cups per day, or 400 milligrams of caffeine per day, is not associated with any long-term health risks, Loftfield added.
According to the American College of Obstetricians and Gynecologists, moderate intake of coffee, up to 200 milligrams per day is safe for pregnant women.