The study found that compared to non-coffee drinkers, those who consumed three cups of coffee each day appeared to reduce their risk of being diagnosed with heart problems. Drinking coffee was also linked to a lower risk of diabetes, liver disease, dementia and some cancers.

Meantime, while three of four cups of coffee was likely to be the optimum number, those who drank as many as seven cups a day still appeared to benefit, the study said.

“Coffee is one of the most commonly consumed beverages worldwide,” the researchers said.

“As such, even small individual health effects could be important on a population scale … Coffee consumption seems generally safe within usual levels of intake, with summary estimates indicating largest risk reduction for various health outcomes at three to four cups a day, and more likely to benefit health than harm.”

Previous research found that regular coffee consumption could be linked to a reduced risk of chronic diseases – whether people choose to drink caffeinated or not.

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