11 Jul 2017 --- People who drink around three cups of coffee a day may live longer than non-coffee drinkers, according to a study in which scientists analyzed data on coffee consumption from more than half a million people across ten European countries. In a subset of 14,000 people, the researchers also analyzed metabolic biomarkers, and found that coffee drinkers may have healthier livers overall and better glucose control than non-coffee drinkers.