Magnesium Oxide Is Derived From Ancient Oceanic Deposits. It Is An Essential Mineral In Our Body, About Half Of Which Is In Our Bones. Magnesium Oxide Is A Cofactor In Many Essential Functions Within The Body, Supporting Energy Production, Heart Health, Bones Health And Healthy Nerves Function. Magnesium Oxide Also Supports Digestive Health, It May Work As An Antacid To Help Relieve Heartburn Or Sore Stomach And As A Laxative To Help Relieve Constipation