Acute Hypercalcemia Following Excessive Calcium Supplementation in a Dehydrated Patient With Progressive Multiple Sclerosis: Vitamin D Supplementation Is a Red Herring—Reply

In reply

We thank Hanwell and Kimball¹ for their interest in our case report.² Recently, the Institute of Medicine recommended that individuals aged 51 to 70 years (our patient's age bracket) have a daily intake level of 1200 mg of calcium and 600 IU of vitamin D.³ It also suggested tolerable daily upper intake levels of 2000 mg and 4000 IU for calcium and vitamin D, respectively.³