A study from the University of Canterbury has found people want to know how much exercise they'll need to do to burn off calories from their food.
They want the information to be on food labels.
Researchers found labels which only show how many calories a food item contains have little or no impact on people's behaviour.
But when they're told how much jogging they'll need to do to burn off a chocolate bar, it does make a difference to what they buy.
Photo: NZ Herald