Lack of sleep can DECREASE your longevity
12.19.09
LACK OF SLEEP (- 5 years)
Good-quality sleep is positively linked to successful aging and longer survival. On the flip side, fragmented sleep patterns tend to be a sign of faster aging and disease.

Sleep studies prove that disrupted sleep raises levels of cortisol, blood fats, blood pressure, and cholesterol – all very powerful risk factors for cardiovascular disease. Additional effects of sleep deprivation include depression, irritability, decrease in immune function, memory and concentration levels and ability to handle stress.
The American Cancer Society performed a large study in 1950 and found that people who slept for just four or fewer hours a night had the highest death rates – while those who sleep excessively nine to ten hours a night had higher death rates. More recent research has confirmed that people sleeping six to seven hours a night live the longest.
