Researchers at the University of Sydney designed the study to test how belief and biology interact during caffeine withdrawal.

The surprise finding of this study involved what scientists call an open-label placebo.

Your daily dose of coffee, tea, or soda might seem like just what you need to rouse you from your sleep or help get you through the midday doldrums, but there are reasons you might decide to quit your ...

Add Yahoo as a preferred source to see more of our stories on Google. According to a Yahoo/YouGov poll, 30% of Americans have tried to quit caffeine, but only 6% said they were successful.