If the middle-aged and elderly people have a calcium deficiency, they can take calcium supplements such as calcium gluconate and calcium carbonate to replenish calcium, and they can also consume some foods with high calcium content such as shrimp and dairy products to supplement. If the middle-aged and elderly people have serious calcium deficiency, they can take calcium bicarbonate tablets, calcium gluconate, high calcium tablets, Vitamin D calcium chewable tablets and other calcium supplements to replenish calcium according to the doctor’s advice. If calcium deficiency is not very serious, it can be supplemented by eating foods with high calcium content. Normally, you can eat more milk (104mg/100ml), yogurt (114mg/100ml), sesame seeds (780mg/100ml), shrimp and other foods with high calcium content. In addition, middle-aged and elderly people can usually participate in more outdoor activities, which can help promote the absorption of calcium. The above medication should be taken in accordance with doctor’s advice.