Chelated Cal-MagCompare to Ortho Molecular Reacted Cal Mag Chelated Cal Mag includes three forms of highly absorbed calcium and magnesium for a variety of protocols. Calcium is most well known for its role in the formation of bone and teeth, but it also plays a role in keeping the heart and muscles functioning by governing muscle contractions. Magnesium is also a constituent of bone and controls potassium and calcium uptake, assists in electrical nerve activity, and