Plenty of people will declare they can’t start their morning without a cup of coffee to wake them up—but what happens if you drink it when your brain should be unwinding in preparation for sleep?A study from researchers at the University of Texas at El Paso, now published in iScience, aimed to discover exactly what caffeine does to your brain at night, and whether there was any noticeable difference to drinking it at different times of the day.
Paper author and biologist Paul Sabandal said in a statement that due to caffeine’s popularity, he and his colleagues “wanted to explore whether additional factors influence its impact on behavioral control.”
It is estimated that as many as 85 percent of Americans may drink coffee daily—with more than two billion cups thought to be drunk each day around the world.