Prevention of Postoperative Hypocalcemia of Oral Vitamin D Supplementation Before Total Thyroidectomy

"Since the concentration of D-mac 30,000 IU in the body reaches the maximum in the body around 1 to 3 weeks after administration, the drug is taken once 15 days before the surgery so that the vitamin D3 concentration is maximized at the time of surgery.~In the case of the control group, there is no drug to be taken."