This is to pass on some things I have learned, by experience, about taking magnesium for RLS. It is very helpful for calming the nerves, and helpful with sleep. Also relaxes the muscles. BUT, that does not mean just any magnesium! Magnesium Oxide is the worst. It is not well absorbed as a mineral, and it causes rather severe Diarrhea, especially in amounts needed to help RLS. Magnesium Citrate is easily absorbed, and does not cause severe diarrhea (just a bit loose.) Then there are magnesium taurinate, succinate, glycinate and malate. Those are very good also.
I have been using either the mag. citrate, or a product that has a combination of all the other mags listed above, called Source Naturals Ultra-Mag. I take about 600 mgs. 1 tablet in the morning and 2 tablets before bed. I have even taken 1 more in the middle of the night if I feel I need it, but usually I don't. Many alternative doctors recommend taking about that much as magnesium is involved in a few hundred issues in the body.
I found out by accidental experimentation just how necessary magnesium is, at least for myself, but I will bet for others as well who have RLS. I was running low, so rationed the few capsules I had left, then I RAN OUT completely! During those days, the RLS started acting up again, BUT on the night I had none, it was TERRIBLE! I was up most of the night with RLS in my leg and both arms (I usually only get it in 1 leg.) The electric impulses were coming every 20 or 30 seconds and I could not sleep. Needless to say, I got some magnesium the next day, took some and happily slept so well that night. I sometimes get a flutter of RLS, but hardly at all.
I also take iron bisglycinate and B complex, plus extra folic acid. I do really think the combination of these things is what helps. ( Before I started taking iron, my RLS was not so good, but it got better with the iron.) That is why, for me anyway, leaving anything out seems to cause a problem. Right now, I am happy to be sleeping deeply with only a flutter or two during the night.
By the way, I have also read that there are things that remove the magnesium from your body, such as high blood pressure drugs (I take 2 of these), and alcohol (sadly) esp in excess. Other medications also, but look them up for yourself. I am NOT saying don't take meds you need, I am saying take extra magnesium to make up for it. Also Estrogen Dominance, a whole different issue, saps magnesium as well a B vitamins out of your body. (But look that up yourself.)
Just some info that I hope will be helpful.