I have found that 500mg Magnesium helps me stay asleep as much as anything and maybe helps get to sleep a bit earlier, however it also leaves me much more tired

I have found that 500mg Magnesium helps me stay asleep as much as anything and maybe helps get to sleep a bit earlier, however it also leaves me much more tired than usual the next day. I get a fair amount of magnesium in my diet so I think it might be too much for me, however less doesn't seem to help me sleep. OTOH, I have unusually sever sleep issues so it may be more helpful for many people.