The effect of calcium supplementation varies from person to person, and it is impossible to say whether the effect is good or bad. However, it is more common to use oral form of calcium supplementation than injectable form of calcium supplementation, and it is necessary to follow the doctor’s instructions. Calcium deficiency can be supplemented by calcium injection, but the specific efficacy will be affected by a variety of factors such as the type of medication, the severity of calcium deficiency, individual physical condition and compliance, etc., and there may be individual differences in effectiveness. Therefore, it is not possible to accurately predict the effectiveness of calcium supplementation in specific patients. It should also be noted that in clinical treatment, calcium injection is generally used as an emergency treatment for people with severe drop in blood calcium level, while oral calcium supplementation is still the first choice for most people with calcium deficiency. Therefore, calcium deficiency patients must be under the guidance of a doctor to carry out calcium supplementation therapy, do not blindly dispose of their own, in order to avoid improper intervention, resulting in adverse consequences.