Caffeine may speed up reaction time, but at the cost of an increase in errors and poor judgment, resulting in a “fast and sloppy” decision-making process, reports UAB News.

“Many teens are unable to obtain the proper amount of sleep due to combinations of extracurricular activities, homework and school start times,” said Benjamin McManus, Ph.D., assistant director of the UAB TRIPLab. “This is compounded by a natural shift in biological sleep patterns that occurs in the teen years and leads to naturally falling asleep later, yet still needing to wake early.”