disorders of nutrition
Overview of Vitamins
Causes
 that impair the intestine’s absorption of food (called Overview of Malabsorption ) can cause vitamin deficiencies. Some disorders impair the absorption of fats. These disorders can reduce the absorption of fat-soluble vitamins—A, D, E, and K—and increase the risk of a deficiency. Such disorders include chronic Diarrhea in Adults , Some types of Metabolic and Bariatric Surgery can also interfere with absorption of vitamins. Overview of Liver Disease and In a few people, hereditary disorders impair the way the body handles vitamins and thus cause a deficiency. If people must be fed intravenously for a long time or if the formula used lacks the needed nutrients, people may develop a vitamin (or mineral) deficiency. Drugscan also contribute to deficiency of a vitamin. They may interfere with absorption, metabolism, or storage of a vitamin. 