Did ask my GP for Magnesium RBC testing.
The response was, this is in experimental stages, may not be available on NHS, but will investigate.
Can get private testing at a cost of £75.00.
The big question is it worth the money spent. If the numbers are low who do I go for medication?
Stress test shows my heart is functioning normally, no need for any medication.
My cholesterol is high!, have to keep an eye on cholesterol! Continue with healthy living.
Leg muscle cramp? keep an eye on it.