Chapter 21: Regulation of Calcium and Magnesium Murray J. Favus and David Goltzman

From the Primer on the Metabolic Bone Diseases and Disorders of Mineral Metabolism, 7th Edition. www.asbmrprimer.org Figure 1 Figure 1 Calcium balance. On average, in a typical adult, 1 g of elemental calcium (Ca+2) is ingested per day. Of this, 200 mg/d will be absorbed and 800 mg/d excreted. Approximately 1 kg of Ca is stored in bone and 500 mg/d is released by resorption or deposited during bone formation. Of the 10 g of Ca filtered through the kidney per day, only 200 mg or less appears in the urine, the remainder being reabsorbed. Figure 1 Calcium balance. On average, in a typical adult, 1 g of elemental calcium (Ca+2) is ingested per day. Of this, 200 mg/d will be absorbed and 800 mg/d excreted. Approximately 1 kg of Ca is stored in bone and 500 mg/d is released by resorption or deposited during bone formation. Of the 10 g of Ca filtered through the kidney per day, only 200 mg or less appears in the urine, the remainder being reabsorbed. © 2008 American Society for Bone and Mineral Research

Table 1: Conditions That Increase or Decrease Intestinal Ca Absorption From the Primer on the Metabolic Bone Diseases and Disorders of Mineral Metabolism, 7th Edition. www.asbmrprimer.org Table 1: Conditions That Increase or Decrease Intestinal Ca Absorption © 2008 American Society for Bone and Mineral Research

From the Primer on the Metabolic Bone Diseases and Disorders of Mineral Metabolism, 7th Edition. www.asbmrprimer.org Table 2: Hormones and Conditions That Regulate Urine Ca and Mg Excretion © 2008 American Society for Bone and Mineral Research