Three weeks ago my naturopathic did a full blood work on me for vitamins and iron deficiencies. My ferritin count was a 2 which is extremely low she put me on 100 mg of iron a day (a combo of Floradix and Iron C) for 6 weeks and my rls has been gone since day one of the regiment. I have suffered with rls for years and this is the only thing I have done different. I give all the credit to the huge iron intake that my body so desperately needed. Ferritin count is so important and regular medical drs do not check it.
Iron and Potassium
I have taken potassium supplements for many years (plus iron and calcium) to control my RLS symptoms. It took me a while to find the right balance of supplements, but my RLS rarely keeps me from falling asleep. It still bothers me on long car trips or in a long movie if I'm tired.
I had a sleep study done a couple of years ago, and the doctor remarked at how much leg movement I have in my sleep (even with taking the supplements). He indicated that RLS is associated with low iron. So, I increased my iron a little, and the symptoms improved. I know, however, that the potassium helps because if I run out of it my legs are "dancing" within a couple of days.