Please contact me if you have more information to add. Calcium is critical along with potassium for healthy muscle functions, and heart functions. In one study I read, there was significantly low magnesium levels in FMS individuals and people with FMS in their pain and tenderness levels.
Magnesium works to inhibit the action of Excitatory amino acids.
Increased amino acids can lead to increased pain and discomfort. Low calcium, magnesium, potassium leads to the cramping of muscles, especially in the legs. It is important to the production of energy in the body. Depletion has been hypothesized to be a major cause of physical exhaustion. It must be taken with magnesium.