Nervous System Support 5 Forms of Magnesium for Optimal Bioavailability Supports Healthy Muscle, Nerve & Heart Functions Non-GMO A Dietary Supplement Vegetarian/Vegan Minerals Family Owned Since 1968 GMP Quality AssuredMagnesium is a mineral that is critical for energy production and metabolism, muscle contraction, nerve impulse transmission, and bone mineralization. It is a required cofactor for an estimated 300 enzymes. Among the processes that require magnesium are fat and protein production, as well as glucose metabolism. NOW Magnesium Transporters combines five different forms of magnesium for maximal absorption and utilization.