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A member asked:

Is it possible for magnesium to cause all over muscle fasiculations before serum magnesium is low?

A doctor has provided 1 answer
Dr. Louise Andrew answered

Specializes in Emergency Medicine

We don't know: But many people have low absolute (RBC) magnesium, even if serum level is normal. We are mostly deficient. You should probably try to take about 400 mg Mg daily just as a trial of effect on your fasciculations. It won't hurt you---worst it can do is diarrhea.

Answered 12/24/2018

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