It also decreases the risks of liver diseases, diabetes, some cancers, and dementia.
"Coffee consumption seems generally safe within usual levels of intake", write the researchers, "with summary estimates indicating largest risk reduction for various health outcomes at three to four cups a day".
Experts said people should not start drinking coffee for health reasons or to prevent disease.
However, they say drinking coffee in pregnancy may be associated with harms, and may be linked to a very small increased risk of fracture in women. The study was led by Dr. Robin Poole, a specialist registrar in public health at the University of Southampton in the United Kingdom, and the findings were published in The BMJ.
But - it is important to note - the studies used mainly observational data, which means lower quality evidence, which means no firm conclusions can be drawn about cause and effect.
Doctors however advice the pregnant women, children, people with heart disease or peptic ulcers, and those who are elderly to restrict caffeine.
It contains a number of wonder compounds which possess antioxidant, anti-inflammatory, anticarcinogenic properties which scientists believe might explain why drinkers experience lower rates of chronic liver disease and liver cancer. In other words, if you already drink coffee, enjoy it, but try to make it as healthy as possible.
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Coffee is one of the most commonly consumed beverages worldwide and could have positive health benefits.
Coffee is one of the world's most commonly consumed drinks with an estimated 2.25billion cups drank around the world each day. In the past, the caffeinated drink has been linked to a lower risk of endometrial, skin, prostate, and liver cancers. The greatest benefit was seen for liver conditions, like cirrhosis.
So, the authors urge that "robust randomized controlled trials are needed to understand whether the observed associations are causal".
However, it's worth noting that drinking a lot of coffee can also be detrimental to your health. Drinking coffee beyond these amounts was not associated with harm, but the benefits were less pronounced.
The drink is more likely to ward off disease than to cause harm, according to the most comprehensive report yet conducted.
"There is an adjust of dangers in life, and the advantages of moderate utilization of coffee appear to exceed the dangers", he said. But they insist the findings prove moderate coffee consumption is safe, and more than likely to be good for you.