About magnesiumsmagnesium is essential for enzyme activity, calcium and potassium uptake, nerve transmission, bone formation and metabolism of carbohydrates and minerals. it is magnesium, not calcium, which helps form hard tooth enamel, resistant to decay. like calcium and chloride, magnesium also plays a role in regulating the acid-alkaline balance in the body. high magnesium levels in drinking water have been linked to resistance to heart disease. although it is found in many foods, including dairy products, nuts, vegetables, fish, meat and seafood, deficiencies are common in america due to soil depletion, poor absorption and lack of minerals in drinking water. a diet high in carbohydrates, oxalic acid in foods like raw spinach and phytic acid found in whole grains can cause deficiencies. an excellent source of usable magnesium is beef, chicken or fish broth. high amounts of zinc and vitamin d increase magnesium requirements. magnesium deficiency can result in coronary heart disease