Sleep is an essential function that helps in recharging our bodies and minds. Moreover, healthy sleep also helps the body in remaining fit and it staves off any diseases. When we do not get enough sleep, our brain does not function properly and it can impair our abilities to concentrate, think clearly and process memories. An adequate amount of sleep that an adult requires ranges from seven to nine hours. 

However, work schedules, day-to-day stressors, a disruptive bedroom environment and medical conditions can prevent us from receiving adequate and peaceful sleep. Hence, a healthy diet and good lifestyle habits can ensure a good amount of sleep each night. However, for some people chronic lack of sleep may be a sign of a sleep disorder.