One night of sleep deprivation increases the risk of dementia by 4% and this compounds over time.
Our brains build up toxins during the day and it is only during sleep when those toxins are flushed out.
Personally, getting into a good sleep regimen has been challenging with a spouse who likes it hot when I do not.
So, found alternative solutions such as cool blankets (haven't tried the pillows yet), grounding sheets, and red light bulbs to minimize melatonin disruption.