How much coffee is too much? Your Questions Answered

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Caffeine is well-known for its health benefits, but how much coffee would you need to drink to see a person's life expectancy increase?

"Coffee is the most commonly consumed stimulant in the world - it wakes us up, boosts our energy and helps us focus - but people are always asking 'How much caffeine is too much?'", said Elina Hypponen, a professor at the University of South Australia.

The research team said their study confirms that excess caffeine contributes to cardiovascular disease, particularly high blood pressure.

Having set out to uncover the relation between long-term coffee consumption and heart disease and to explore the potentials of the caffeine-metabolizing gene, the researchers made quite interesting findings.

The researchers analyzed previous studies from around the world that included information about people's coffee drinking habits and their causes of death, including cancer, cardiovascular disease, and diabetes.

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Speaking to The Sunday Times, Astrid Nehlig, a research director at France's National Institute of Health, said: "It is hard to calculate, but my feeling is that drinking coffee possibly adds another couple of years to your life". "In order to maintain a healthy heart and healthy blood pressure, people must limit their coffees to fewer...cups a day".

The team used data from the UK Biobank including 347,077 participants aged 37-73 years. People who drank between two and two and a half cups of coffee had a 4% lower risk of death from cancer. They also found that their conclusions were independent of genetics-meaning those who are highly sensitive to the effects of caffeine were just as likely to develop heart disease over the six-cup limit as those who can drink a triple espresso without getting jittery. "Knowing the limits of what's good for you and what's not is imperative", Hyppönen said in the press release.

And last December further research found that people who drink two to three cups per day have a 12 percent lower risk of early death than people who don't drink coffee at all.

From these figures, researchers discovered that those who drank a moderate amount of coffee - between two and four cups a day - saw all-round reduced mortality rates, regardless of their weight, alcohol consumption, whether or not they smoked, and the caffeine content of their coffee.

"Risk of cardiovascular disease increases with high BP, a outcome of excess caffeine consumption". However, the condition is also one of the most preventable.

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