Middle-aged and elderly people can take calcium supplements through diet regulation, reasonable exercise, sun exposure and medication. 1. Regulate diet: Usually, middle-aged and old people can drink calcium-rich beverages such as milk, yogurt and goat’s milk, and also consume foods with high calcium content such as tofu, sesame and shrimp skin, which can properly replenish calcium for the organism. 2. Reasonable exercise: middle-aged and elderly people usually need to appropriate exercise, such as walking, jogging, tai chi, etc., not only can maintain the calcium balance in the body, but also increase muscle strength, prevention of osteoporosis. 3. Sunbathing: Appropriate sunbathing for middle-aged and elderly people can promote the formation of vitamin D₃ in the body, and vitamin D can promote the absorption of calcium, which can also be an appropriate calcium supplement. However, it is necessary to reasonably control the time of sunbathing to avoid burning the skin. 4. Taking drugs: If the calcium deficiency of middle-aged and elderly people is more obvious, you can also follow the doctor’s advice to take calcium gluconate, calcium carbonate D3 and other drugs, calcium supplement. It is recommended that middle-aged and elderly people choose a reasonable way of calcium supplementation according to their own situation, and if they need to take medication, they should follow the doctor’s instructions.