RT Book, Section A1 Saunders, Katherine H. A1 Igel, Leon I. A2 Papadakis, Maxine A. A2 McPhee, Stephen J. A2 Rabow, Michael W. A2 McQuaid, Kenneth R. SR Print(0) ID 1184162967 T1 Disorders of Vitamin Metabolism T2 Current Medical Diagnosis & Treatment 2022 YR 2022 FD 2022 PB McGraw-Hill Education PP New York, NY SN 9781264269389 LK accessmedicine.mhmedical.com/content.aspx?aid=1184162967 RD 2024/04/23 AB Deficiencies of single vitamins are less often encountered than those of multiple vitamins. Although any cause of protein–calorie undernutrition can result in concurrent vitamin deficiency, most deficiencies are associated with malabsorption, alcoholism, medications, hemodialysis, total parenteral nutrition, fad diets, or inborn errors of metabolism.