Whether it is better to take calcium injection or calcium tablets needs to be chosen according to the patient’s specific symptoms and calcium deficiency. 1. Calcium injection: Calcium injection is suitable for emergency calcium supplementation, such as sudden convulsions after thyroid surgery, calcium gluconate can be injected immediately to relieve the symptoms. In addition, patients with hypocalcemia are also suitable for intravenous injection of calcium gluconate or calcium chloride to replenish calcium ions in the body, so as to replenish calcium ions to protect the heart. 2. Calcium tablets: Usually suitable for adolescents or middle-aged or elderly people during their growth and development period, it is beneficial to enhance bone density. It can also reduce the common teenage twitching of the calf in the middle of the night. For non-urgent cases, taking calcium tablets is also feasible. If there is any discomfort, you should seek medical advice and take medication as prescribed by your doctor. It is advisable to consult your doctor if and how to take calcium supplements.