Elderly people through food calcium is best, you can eat some lean meat, eggs, and pomelo, dragon fruit, apples and other fruits, as well as fresh green leafy vegetables, kelp, fungus and other vegetables, which can increase the body's resistance, but also conducive to defecation, but also conducive to replenishment of calcium and other trace elements. However, if the elderly have serious osteoporosis, or conduct laboratory tests for trace elements calcium deficiency, you can supplement some calcium supplements, it is best to apply under the guidance of a doctor, you can supplement some organic calcium, easier to absorb.