Doctor’s Best uses a patented, organic, chelated delivery form of magnesium that is 100% chelated to optimize bioavailability. Doctor’s Best High Absorption Magnesium is not buffered, meaning that is it not mixed with less expensive and less absorbable magnesium oxide. Inadequate magnesium negatively affects not only the heart, blood vessels, and bones, but may also impact blood sugar balance. Research has shown a link between magnesium and healthy blood pressure. A decrease in bone mineral density is associated with lower blood magnesium levels.