Nervous System Support Supports Energy Production Critical for Enzyme Function Non-GMO A Dietary Supplement Vegetarian / Vegan Kosher Minerals Family Owned Since 1968 GMP Quality Assured Magnesium 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 reactions catalyzed by these enzymes are fatty acid synthesis protein synthesis and glucose metabolism. Magnesium status is also important for regulation of calcium balance through its effects on the parathyroid gland. This magnesium citrate is a fully reacted mineral supplement.