Cal/Mag Plus provides a complete, balanced supplement to deliver calcium to where it should go in the body. Metabolic Maintenance's unique formula combines calcium and magnesium with two powerful calcium boosters: vitamins D-3 and K-2. Studies have shown that supplementing with magnesium can aide with bone mineralization and muscle relaxation. Vitamin D, most active in the D-3 form, is also essential to maximize absorption of calcium. Vitamin K-2 has been found to promote the synthesis of proteins involved with calcium utilization, helping to keep calcium out of arterial walls and in the muscles and bones where it belongs.*