Magnesium in Prevention and Therapy, Nutrients 2015, full paper

"...Conclusions
Magnesium is an essential electrolyte for living organisms. Magnesium intoxication is rare. A magnesium deficiency is associated with a variety of diseases. In humans, a magnesium deficiency is associated with cardiovascular diseases, e.g., hypertension, pre-eclampsia, arrhythmias, heart failure. Arteriosclerosis, diabetes mellitus, and metabolic syndrome often occur in magnesium deficient humans. Furthermore, neurological symptoms are strengthened in magnesium deficient patients. Magnesium supplementation in those patients can be of benefit in most cases...." http://www.mdpi.com/2072-6643/7/9/5388/htm