I agree with HammerSmoke...I take a combination of magnesium citrate and magnesium malate ( Magnesium Complex and it works great. I know when I'm not taking enough (or have forgotten to take it) because I'll start feeling a lot of soreness and tenseness in my neck and upper back muscles. I've also found that magnesium helps with my anxiety and stress.

Now that I'm living close to a coal-burning power plant (yeah!), I'm getting re-exposed to mercury and some of my old symptoms are returning, fortunately not as bad as when I had my amalgams in, but noticeable enough that it's a real bummer. I've had to up my magnesium, vitamin C and Algin intake to compensate.