Science Says This Is Why You Are Tired All the Time

Are you mid-yawn right now wondering how you’re going to make it through the workday? Did you hit the snooze button more than twice this morning before getting out of bed? Do you find yourself dozing off mid-afternoon, wishing you were in that perfectly cozy and warm bed of yours? Unfortunately you’re not alone; in fact, a Centers for Disease Control and Prevention study found that 30%—more than 40 million Americans—aren’t getting enough sleep and are in a constant state of fatigue. But sleep shortage isn’t the only reason for our lack of energy. Scroll down for a few scientific explanations for why you could be tired all the time.