If you drink two or more soft drinks a day, you may want to cut back. A recent study by the World Health Organization found that people who drink two or more soft drinks a day, even if they are diet sodas with no calories, have a higher risk of mortality than individuals that have one soft drink a month. The study tracked 451,743 men and women in 10 European countries for 16 years. They joined the study between 1992 and 2000 and researchers followed up with them for an average of 16 years. During that time more than 41,600…