I use to have severe cramping in my legs at night and numbness and tingling during the day.
My naturopath suggested that I take a calcium/magnesium supplement, but it did not seem to help.
Months later I had blood work done at my family physician and my B12 was way down.
My naturopath suggested that I take 2mgs of B12 subl. a day and after 3 months I noticed a big difference.