I also take Magnesium and swear by it. I also suspect I have some underlying kidney issues retaining many electrolytes and started taking a potassium with the magnesium at bedtime and it has transformed my sleep into baby-land. I sleep so hard now and when I wake up, I have no problem getting right back to sleep. I feel so refreshed the next day it is honestly shocking to me. I have always said that before I started taking both that I felt like I was on a one-way track to dementia. That is just how I felt. Very anecdotal, but I believe it in my bones.