In prediabetes, blood sugar levels are chronically high, and the body may also become less sensitive to insulin, a condition called insulin resistance.

Doctors reviewed 11 recent placebo controlled magnesium studies covering 543 people with prediabetes or insulin resistance. Doses in the studies ranged from 365 to 450 mg of magnesium per day and lasted from one to six months. Overall, those taking magnesium supplements saw systolic and diastolic blood pressure decline by 4.18 and 2.27 mmHg, respectively. Doctors said the magnitude of improvement in blood pressure has great clinical significance not only in prediabetes but for those with type 2 diabetes and chronic heart problems. Magnesium appears to improve the flexibility of blood vessel linings, helping to lower blood pressure.

Reference: American Journal of Clinical Nutrition; July, 2017; 106(3): 921-929.