Swanson Triple Magnesium Complex is the best supplemental source of magnesium for a strong, healthy body. One of the most important minerals in the diet, magnesium is essential for strong muscles and bones and nervous system function. Magnesium offers cardiovascular support and promotes healthy blood pressure levels. Emerging science shows it may also support digestive health. This unique formula delivers nearly a full day’s supply of this vital mineral from three distinct sources for an array of benefits.