A dietary supplement. Proper magnesium levels are required to help maintain: Good cardiovascular health* Normal heart rhythms* Proper muscle function* Magnesium chloride for increased absorption versus magnesium oxide Enteric coating to help prevent stomach upset 238 mg of calcium per 2 tablet serving 143 mg of magnesium per 2 tablet serving According to a USDA Agricultural Research Report, 7 out of 10 Americans are below the Dietary Reference Intake for Magnesium. Questions? 888-726-7573 (8am – 5pm, EST, Mon – Fri.) *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.