Magnesium oxide 400 mg. Pharmaceutical grade. The No. 1 doctor recommended magnesium supplement. Most concentrated magnesium brand. 241.3 mg magnesium per tablet (Max-Ox 400 contains more elemental magnesium per tablet than other leading brands). Sugar and gluten free. The Importance of Normal Magnesium Intake: Essential mineral needed by every cell in your body. Helps maintain normal muscle and nerve function. Helps keep heart rhythm steady and maintain normal blood pressure. Helps in the absorption of calcium and potassium. Symptoms of a Magnesium Deficiency: Leg cramps; migraines; fatigue. Reasons for a Magnesium Deficiency: Dietary intake - up to 75% of Americans don't get enough magnesium in their diets. Prescription drugs - diuretics, cisplatin, and cyclosporine deplete magnesium. Health conditions - pre-diabetes, diabetes, cardiovascular disease, and high blood pressure are commonly associated with a magnesium deficiency. Just two tablets provide the magnesium your body needs everyday. Most concentrated form of magnesium. 241.3 mg elemental magnesium per tablet. Pharmaceutical Grade quality. Mag-Ox 400 is manufactured to rigorous quality standards. For over 50 years, Blaine Pharmaceuticals has provided premium quality products. Make sure your magnesium supplement carries the Pharmaceutical Grade symbol. (These statements have not been evaluated by the Food and Drug Administration. This product Is not intended to diagnose, treat, cure, or prevent any disease.) Made in USA.