Calcium and Magnesium are essential for proper bone development and muscle and heart function. Both minerals are involved in more than 300 enzymatic reactions which produce energy. Calcium and Magnesium are also necessary for muscle function. They provide the mechanism for muscle contraction and relaxation, including the heart muscle.An ideal balance of two important minerals in 100% natural and pure forms. It includes an advanced citrate/malate complex which enhances absorption of calcium through the intestine. Magnesium citrate provides excellent solubility for superior absorption.