People who don’t sleep are more likely to develop heart disease, cancer, and depression. “We now have compelling evidence that, in addition to cognitive impairment, sleep loss is associated with a wide range of detrimental consequences, with tremendous public-health ramifications,”
Read "Why We Sleep" by Matthew Walker if you want more elaborate information on the harm acute/chronic sleep deprivation can do to your body. It is WILD. You will never want to miss out on 7 hours of sleep again.