Magnesium

Magnesium is an abundant mineral in the body. The NIH Office of Dietary Supplements says it is a cofactor in more than 300 enzyme systems. These include protein synthesis, muscle and nerve function, blood glucose control and blood pressure regulation.

In a hydration product, it sits beside sodium and potassium as part of the electrolyte mix. Rapid Restoration Drops list magnesium (from electrolyte complex) at 90 mg per 1 tsp serving on the label. Workers with kidney problems or on medicines should ask a doctor before using any supplement. See electrolytes 101 for more.