Most were coffee drinkers, nearly one-third or 154,000 people drank two to three cups daily and 10,000 drank at least eight cups daily.
After 10 years of the study, results showed that non-coffee drinkers were more likely to have died than those who didn't drink coffee.
"Coffee drinkers, compared with non-coffee drinkers, were more likely to be male, white, former smokers, and drink alcohol", the study found. "Such people would be better to avoid too much coffee, or move toward decaffeinated choices, that this study has shown still have beneficial associations".
Coffee lovers around the world are enjoying their cup of brew a little bit more today.More news: England and Colombia World Cup last-16 match goes to extra
"These findings ... provide further reassurance that coffee drinking can be a part of a healthy diet", the researchers wrote. A deeper look into diet could also cast light on whether the people who drink coffee also have other characteristics that may be the real reasons they were less likely to die during the study.
However, despite the findings, the researchers are warning people not to significantly increase their coffee intake in a freakish quest for eternal life.
"There has been concern about the health effects of heavy coffee drinking, particularly in participants with common genetic polymorphisms that affect caffeine metabolism", the researchers wrote.
The study from the U.S. National Cancer Institute used information from more than half a million British volunteers who provided blood samples and answered detailed health and lifestyle questions.
"Early on, there were some reports of potential adverse effects as far as coffee and health outcomes", said Alice Lichtenstein, the Gershoff Professor of nutrition science and policy at Tufts University. "I just know that it has a bad rap", Mr Gardiner said.More news: Cheryl Cole rubbishes rumours around what caused her split with Liam Payne
Past studies have indicated an inverse association between drinking coffee and the risk of developing chronic conditions such as heart disease, diabetes, Parkinson's and cancers of the liver, bowel, colon and endometrium.
Two to five cups, one cup per day, or less than one cup per day reduced early death rates by 12, eight and six percent, respectively.
Caffeine can cause short-term increases in blood pressure, and some smaller studies have suggested that it might be linked with high blood pressure, especially in people with a genetic variation that causes them to metabolise caffeine slowly.
He added: "Healthier coffee, free from sugar or syrup, should also be encouraged to optimize any health benefit". So if you drank that coffee, you had a slightly lower chance of dying during the 10 years the study examined.
For the study, researchers invited 9 million British adults to take part; 498,134 women and men aged 40 to 69 agreed.More news: Tina Turner's Oldest Son Dead at 59 from Self-Inflicted Gunshot
Drinking coffee could cut the risk of death even in those who struggle to metabolize caffeine, scientists believe.
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