No less than two recent medical studies suggest that drinking coffee is much healthier than popular belief would have it. One of these was a long-term study into the effects of caffeine on the central nervous system involving more than 1400 people in Sweden and Finland. People who drink three to five cups per day may have a much lower risk of developing Alzheimer’s or dementia than people who drink little or no coffee. Another study, carried out in Boston and published in the scientific journal Circulation, revealed that the risk of a stroke was reduced by 20% in people who drink more than four cups per day.