Two powerful minerals. One simple, high-potency formula. Responsible for hundreds of biological functions in your body, calcium and magnesium are essential minerals with big potential health benefits. While your body uses about 99% of its calcium for teeth and bones, about 1% plays key roles in vascular contraction and vasodilation, muscle function, nerve transmission and more. Meanwhile magnesium is a cofactor in more than 300 biochemical reactions including healthy protein synthesis, blood glucose support, muscle and heart function as well as healthy mood and restful relaxation. Solaray Cal-Mag 1:1 is formulated with calcium and magnesium that are chelated to citric acid for enhanced absorption and bioavailability. And because we're committed to crafting products that just work better, we've included a sun-grown, special base of herbs as well as Vitamin D-2 for enhanced absorption and bioavailability to help you live life fully!