You rely on caffeine to get through the day

 
Starting your morning with a java jolt is no big deal—in fact, studies show that up to three daily cups of coffee is good for you—but using caffeine improperly can seriously disrupt your sleep-wake cycle, says Dr. Towfigh. Caffeine blocks adenosine, the byproduct of active cells that drives you to sleep as it accumulates, he explains. A study published in the Journal of Clinical Sleep Medicine revealed that consuming caffeine even six hours prior to bedtime affects sleep, so cut yourself off by mid-afternoon and watch out for these surprising sources of caffeine.

Source: Linda Melone