Heart Mag contains 50 mg of elemental magnesium, derived from 770 mg of magnesium orotate, the well-researched nutrient for cardiac function under stress. Magnesium is among the most critical micronutrients essential for life. Heart Mag delivers 770 mg of magnesium orotate per capsule; it’s the form of magnesium recognized for its cardiac benefits. It helps maintain normal electrolyte balance, which is crucial for contractile function of muscles, especially for the heart. Maintaining an adequate level of magnesium can also prove beneficial for smooth cardiac function during periods of stress.