Beyond leaving you drowsy and irritable, sleepless nights can take aserious toll on your physical and mental health. "We know sleep is a critical biological function that influences a wide variety of physiological process," said Dr. Susan Redline, a sleep specialist at Brigham and Women's Hospital in Boston. "Sleep deficiency can affect mood and the ability to make memories and learn, but it also affects metabolism, appetite, blood pressure, levels of inflammation in the body and perhaps even the immune response." Lack of sleep has been linked to stroke, obesity, diabetes, anxiety, depression, and the country's No. 1 killers: heart disease and cancer. Read on to learn the health hazards of sleep deficiency and how you can sleep better. HEALTH HAZARDS LINKED TO LACK OF SLEEP Stroke A new study of more than 5,600 people found those who slept fewer than six hours a night were more likely to suffer a stroke than their well-rested counterparts. "We speculate...
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