Researchers at the University of Southampton have concluded that as many four cups of coffee a day do a person more good than harm. They gathered observational data on the impact of coffee on all aspects of the human body and published the results in the British Medical Journal Tuesday. Those who drink three or four cups of coffee every day could significantly reduce the chances of early death, a study suggests. A review of more than 200 studies found coffee consumption was “more often associated with benefit than harm,” adding even people who drank as many as seven cups of coffee were likely to be safe. They warned people should not start drinking coffee, or increasing their intake, for health reasons. Too much coffee for women during pregnancy could also be harmful, the study said. The study found that compared to non-coffee drinkers, those who consumed three cups of coffee each day appeared to reduce their risk of being diagnosed with heart problems. Drinking coffee was also linked to a lower risk of diabetes, liver disease, dementia and some cancers.