I barely took notice that during my 3 hospital stays so far this year they included an IV drip of magnesium each time, but when I mentioned it to my PCP in June, she included magnesium testing in my blood work. Of course my levels were low, and she suggested magnesium oxide, available OTC and very cheap.
Frankly, it did nothing (only 4% of magnesium oxide is bio-available) and then I read up on magnesium and I'm now taking a slow release magnesium chloride.
What magnesium does is release the knotting or tightening in the muscles caused by an imbalance of calcium and magnesium (although we NEED the calcium for our bones).
Glad to say I haven't been awakened by any leg cramps since I started taking it, but I still have occasional back pains, esp. when I'm standing in the kitchen a long time when canning. I'm not sure I'm taking enough, but it will show up on my next blood work later this week.
My doctors say 90% or more of us are deficient in magnesium so if you are having musculature problems or cramping, I suggest asking your doctor to do a blood test for magnesium. DO NOT rely on any recommendation for magnesium oxide, but choose the more absorbable magnesium chloride instead, and/or read The Magnesium Miracle by Dr. Carolyn Dean.
Health-wise, I'm doing okay since my recent fairly mild heart attack, and I have a follow-up appointment tomorrow at the hospital in NC. I still have lots of bruises from all the heparin shots, and the place where they went into the femoral artery has lots of sore muscles around it still, although the incision has healed. I've been restricted from driving or lifting anything heavier than a half-gallon of milk, have a Home Nurse 2X a week, and PT 2X a week because I've fallen a few times for no reason.