Chelated Cal-Mag with 500 IU Vitamin D3 is a perfect blend of chelated calcium and magnesium with high potency vitamin D3 to support a broad range of health benefits. Calcium and magnesium while contributing to the development and maintenance of bones and teeth also play a role in the maintenance of normal muscle function and are an important factor in the maintenance of good health. KEY BENEFITSPromotes strong bones and teeth. May assist in postponing or preventing the onset of osteoporosis. Supports nerve and muscle function.   Critical for cardiovascular health, normal blood pressure, nerve and muscle function, reduction of symptoms of PMS and many enzyme reactionsDetailsProvides vitamin D3, the form that is readily absorbable and highly bioavailablePharmaceutically pure, seashell-derived calciumExclusive double amino acid chelation to promote higher calcium and magnesium absorption*Formulated with the preferred 2:1 ratio of calcium to magnesium to best meet our body's needsUsageTake 3 tablets daily as a supplemental source of calcium, magnesium, and vitamin D.