Nearly half of American adults are sleep deprived, according to a study.

Study: Half of Adults Are Sleep Deprived

And if you're a little bit sleepy right now, you're not alone, nearly half of Americans are sleep deprived. That's, according to a new study published earlier this week, nearly half of the 9000 adults in the study reported at least an hour of social jet lag during the week. Now, if you're curious what social jetlag means, social jet lag happens when the time of sleep preferred by a person's inner biological clock and the one dictated by society is not a good fit. More than 30% reported sleeping at least an hour less than the doctor recommended minimum. Now, sleep deprivation can lead to insomnia, excessive sleepiness, daytime fatigue, difficulty concentrating and more serious health issues.