Most of us know that calcium is important for strong bones. But do you know how much calcium you need daily to keep your bones healthy? Do you know if youre actually getting enough-and what you can do if youre not? "Calcium is important not only for bone strength but also for proper functioning of nerves and muscles, even for proper blood clotting," says Bruce Long, MD, a rheumatologist in Cleveland Clinics Center for Osteoporosis and Metabolic Bone Diseases. "So you need to have the right amount in your body-and there are several things you can do to ensure that you do."