Extra Calcium for Those Who Need It. We all need calcium to maintain healthy bones and teeth, and few of us get enough of it. But some people's needs for calcium are higher than others. SISU Calcium and Magnesium 2:1, are intended to provide bone support for individuals with some risk factors for bone loss.

SISU Calcium and Magnesium 2:1 strikes a delicate balance, providing enough magnesium to do its important job, but not too much. Magnesium is essential to calcium absorption: it activates the enzyme that triggers formation of calcium crystals in bone; and it converts Vitamin D, which is also essential to calcium absorption, to its active form.