Americans are stopping for gas, but they aren’t grabbing their usual snacks or smokes. The change in behavior is hurting U.S. sales of Doritos, Twinkies, Heath bars and Newports.

both food dyes are used in Skittles. The U.S. Food and Drug Administration said the two ingredients are also used in other soft drinks, sweets and cereals, such as Doritos, Fruit Loops ...