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There's a new study from Australia that found chewing gum not only raises alertness, it also reduces stress and anxiety. Study participants were subjected to a test called DISS (Defined Intensity Stressor Simulation). The gum chewers also had "significant improvement in overall performance on multi-tasking activities."
The study was done in conjunction with Wrigley, and their Wrigley Science Institute. I'm not discounting the study results, but I also think that's something to keep in mind. What do you think about this study?