Did you have coffee this morning? How are you feeling? Just okay? You probably drank it at the wrong time, because clearly you have no respect for science.
That's right, there are specific times of day that are optimal for caffeine intake, and a new video from AsapSCIENCE breaks down when and why. It's all about cortisol levels (cortisol is a hormone related to your alertness). These levels peak during certain times, including 8-9am. Drinking coffee at peak cortisol-production times will lessen the effect of the caffeine and will make you more dependent on coffee in the long term.