MAGNESIUM OXIDE HEAVY POWDER is commonly known as magnesia which is very hygroscopic. It is used in the treatment of heartburn, sore stomach and acts as a laxative of short term. Magnesium deficiency is usually caused by prolonged vomiting, gastrointestinal disorders, kidney disease, diarrhea, certain drugs and other conditions. It is very important for producing energy, maintaining heart, bones, nerves and muscles health.