title: The five possible causes of all nutrient deficiency: illustrated by deficiencies of vitamin B 12.
mesh_terms: D000367:Age Factors; D004032:Diet; D005260:Female; D005492:Folic Acid; D005494:Folic Acid Deficiency / Q000145:classification / Q000209:etiology*; D005767:Gastrointestinal Diseases / Q000150:complications; D006801:Humans; D007223:Infant; D007437:Intrinsic Factor / Q000378:metabolism; D008286:Malabsorption Syndromes / Q000150:complications; D008659:Metabolic Diseases / Q000150:complications; D008661:Metabolism, Inborn Errors / Q000150:complications; D009748:Nutrition Disorders / Q000209:etiology*; D009747:Nutritional Physiological Phenomena; D009751:Nutritional Requirements; D011247:Pregnancy; D013997:Time Factors; D014805:Vitamin B 12 / Q000037:antagonists & inhibitors / Q000378:metabolism; D014806:Vitamin B 12 Deficiency / Q000145:classification / Q000209:etiology*
chemical_list: D007437:Intrinsic Factor; D005492:Folic Acid; D014805:Vitamin B 12