Mag Cal Formula 2 provides aspartic acid chelated magnesium and calcium in a 2:1 ratio, specifically formulated to assist with efficient muscle contraction and relaxation. Studies show that magnesium is required in greater quantities to prevent muscle fibrillation and cramping during prolonged periods of physical activity, and is a natural calmative for both the cardiovascular and nervous systems. Muscle cramping may be caused by a high level of calcium molecules in the muscle.