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 around 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 control, muscle and heart function as well as healthy mood and restful relaxation. Solaray Cal-Mag 2:1 is formulated with calcium and magnesium and 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-3 designed for enhanced absorption and bioavailability to help you shine!