Mega-Mag liquid magnesium is a rich, natural source of concentrated magnesium ions with other minerals and trace elements that act as natural co-factors. Magnesium is essential to over 400 different enzyme reactions and various other body functions. Magnesium ions (charged magnesium atoms) play a key role in nerve conduction, muscle contraction, bone and tooth formation, protein metabolism and are particularly important to heart and circulatory health. Research has shown many American diets to be deficient in magnesium. Supplement Facts Serving Size: 0.8 tsp. (4 ml) Servings Per Container: 30 Amount Per Serving %DV Magnesium 400 mg 100% Chloride 1120 mg 33% Sodium 3 mg <1% Potassium 3 mg <1% Sulfate 60 mg † Boron 500 mcg † † Daily Value (DV) not established. Suggested Use 1/4 to 0.8 teaspoon (1 to 4 ml) daily with juice or food to mask the highly concentrated mineral flavor.