You've had a rough night's sleep and the only thing you can think straight about is making a really strong cup of black coffee. You feel like you're craving that caffeine, but it turns out that waiting a little bit longer might be the best thing to do for your body's metabolism.

Researchers from the Centre for Nutrition, Exercise & Metabolism at the University of Bath in the U.K. have uncovered how drinking coffee first thing in the morning after a bad's night sleep may do more harm than good to your metabolism.

The findings were published in the British Journal of Nutrition.