Advance in research indicates that sleep aids in improving our cognitive performance as well as memory . Scientific evidence also shows that sleep facilitates the development of our endocrine and immune systems . There exist a number of case studies linking sleep deprivation to obesity , diabetes , digestive dis , depression , and hypertension . It influences our mood and quality of life . The National Sleep Foundation attributed poor sleep to cause accidents all over America with 100 ,000 crashes , 71 ,000 injuries and 1 ,500...
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