Deep Ocean Minerals is sustainably extracted from deep ocean water protected by a nature reserve. Deep Ocean Minerals contains over 70 essential minerals and trace elements, including magnesium, which catalyzes over 300 enzyme and hormone reactions. These macrominerals and trace elements give structure to our organs, tissues, and bones, and help maintain fluid balance, pH balance, and membrane permeability.Each 1/2 teaspoon (2.5 mL) contains: Ocean Mineral Concentrate (seawater*) 3034mgCalcium 50mcgMagnesium 100mgPotassium 20mgSodium 40mgBoron 125mcgIodine(potassium iodide, kelp [whole])75mcg