Can lack of sleep reduce your life say if you had under 5 hours a night ?

Increased mortality: Insufficient sleep is associated with increased risks of developing heart attacks, strokes, diabetes and obesity. It also leads to worsening of mental health conditions, mental alertness and performance ability . This is why sleep disorders such as sleep apnea are so important to treat . The American Academy of Sleep Medicine recommends at least seven hours of sleep per night based on research.

Sleep deprivation: over time can effect one's mental and physical health. See: http://www.aasmnet.org/Resources/FactSheets/SleepDeprivation.pdf Suggest you see your pcp to rule out medical causes for any sleep difficulties. I hope this helps. Best wishes.