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A study from 2002 found that more than seven hours of sleep each night was associated with a shorter life span. When the subjects slept longer than seven hours a night, the risk of dying in that period rose. For people who slept for an average of eight hours each night, the chance of death rose by 12%. canadian antibiotics
Other researchers have found that life expectancy declines as the amount of sleep falls below seven hours but does not drop as steeply as with eight hours or more. Some think that people who sleep longer might have illnesses that cause fatigue and earlier death.
