In a letter to the U.S. Food and Drug Administration, the consumer watchdog group Center for Science in the Public Interest called on officials to ban the use of caramel coloring in popular soft drinks, citing a possible cancer risk. This isn’t the first time that CSPI has targeted the food additive that gives colas, including Coke and Pepsi, their familiar brown color. But the far bigger worry for soda drinkers remains high-fructose corn syrup and other sugars used in soft drinks. "Soda drinkers are much more likely than non-soda drinkers to develop weight gain, obesity, diabetes and other health...