Sleep is one of the necessities of human life-as important as food or water.
It is a time for the body to replenish itself. The mind is also active during sleep, but details of brain activity are less well known than the effect that sleep has on the body. Not getting enough sleep can tax the body and lead to life-threatening situations such as car accidents. Lack of sleep is often a result of another physical or emotional problem. This information was developed and written by the Helios Health team and reviewed by our Medical Advisory Board .