Essential for strong muscles and bones, cardiovascular health and more Helps maintain healthy blood pressure and glucose levels Promotes energy production and muscle relaxation Magnesium is an important mineral that is necessary to good health. Swanson Magnesium delivers 200 mg of magnesium per capsule to help you meet your daily needs. Magnesium is needed for more than 300 biochemical reactions throughout the body. It’s essential for strong muscles and bones, cardiovascular health and nervous system function.