Poor or insufficient sleep is called insomnia when it effects day time function.
Insomnia is a major health risk? Why? Sleep deprivation affects hundreds of genes involved with inflammation, immunity and our response to stress.

Insomnia correlate with a range of health issues such as fibromyalgia, chronic fatigue, obesity, cancer and cardiovascular diseases. Abnormal sleep patterns predict lower life expectancy, and the risk of developing a mood disorder, substance abuse and other adverse health conditions. Lack of sleep is as dangerous as alcohol when behind the wheel of a car.

We now know that sleep is one of the important lifestyle strategies that does make a difference