Why you and your kids should void the colour blue in your food and drinks. Because there is increasing evidence that food colourings cause hyperactivity, reflux, and gas in children. Some people believe that any parent who suspects their child's behavior and health is linked to foods containing bright food colourings, such as blue, should ban these from their diet. Foods which are causing concern include fizzy drinks, party cakes, luridly colored sweets and some sports drinks.
