Don't take calcium if it is not lacking. If it is lacking after professional diagnosis, take it under the guidance of a professional doctor. Doctors who sell drugs can't be trusted. Some small clinics don't accept it. The safest thing is to eat complementary food.

Excessive intake of calcium may interfere with the absorption and utilization of other trace elements, and may also increase the risk of kidney calculi's disease. In other words, the intake of nutrients is not as much as possible, lack is not good for health, and excessive intake may also be harmful to health. Generally speaking, a balanced diet and increased intake of dairy products can basically meet the human body's demand for calcium. Therefore, calcium supplementation is not as much as possible.

The safest thing is food supplement. Foods with high calcium content include: shrimp skin, kelp, laver, crispy fish, oyster, laver, sesame sauce and so on. Animal bone soup is also rich in calcium, but vinegar should be added when cooking to promote the dissolution and absorption of calcium.