Howard Bauchner, editor in chief of the medical journal JAMA and The JAMA Network, noted last month that almost all studies about coffee are association studies. It includes about half a million Brits who contributed their data and DNA to the United Kingdom biobank, and it finds an inverse relationship between people drinking up to eight or more cups per day and all-cause mortality. But overall, "coffee drinkers were about 10 percent to 15 percent less likely to die than abstainers during a decade of follow-up", according to an Associated Press report on the study. They concluded: "Coffee drinking was inversely associated with mortality, including among those drinking 8 or more cups per day and those with genetic polymorphisms indicating slower or faster caffeine metabolism". You still got that slightly lower chance of dying.
In other words while coffee drinking has some benefits especially in dealing with non-communicable diseases, your genes decide how well you metabolise caffeine. This included ground coffee, instant coffee as well as decaffeinated coffee.
But, "drinking coffee is not a miracle in a cup, and is unlikely to prevent the consequences of an unhealthy lifestyle, such as the typical Western diet or smoking tobacco", Heller noted.
Drawing information from the UK's Biobank data resource, which holds information on around nine million people, researchers were also able to profile British java drinkers.
Of course there has also been evidence to suggest that coffee could be bad for you.
One other thing that didn't matter in this study: your DNA.
Adam Taylor, fetching two iced coffees for friends Monday in downtown Chicago, said the study results make sense. In other words, a higher percentage of the non-coffee drinkers died. But though it annoys us when it flip-flops, science does advance.
"Coffee drinkers, compared with non-coffee drinkers, were more likely to be male, white, former smokers, and drink alcohol", Lotfield's team wrote.
So, how much coffee is safe?
And she notes that it's a rare treat when there's something that feels good and actually is good for us.
"It's hard to believe that something we enjoy so much could be good for us". I don't think we do know the number for what is the best number of servings.
And the researchers say there's no added benefit to drinking more coffee than one usually does.
Why? A major limitation of the study is that it failed to adjust for bottle-feeding or breastfeeding, which can affect growth rates, says Tom Sanders, professor of nutrition and dietetics at King's College London.
A new study claimed that drinking coffee will help you live longer, adding to the numerous research the beverage offers several benefits to its fans.