I started adding magnesium glycinate to my vitamin and mineral regimen a couple of months ago.  I didn't think much about it but then I realized I was sleeping through the night a lot of times. 
Sometimes I get up once during the night if I drank coffee, water or juice before bed but then fall back asleep.  Most of the time I get 7 hours of sleep.

I wonder if magnesium glycinate has any unwanted side effects.