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Common Pitfalls in the Management of Patients with Micronutrient Deficiency: Keep in Mind the Stomach

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NUTRIENTS
卷 13, 期 1, 页码 -

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MDPI
DOI: 10.3390/nu13010208

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anemia; atrophic gastritis; ascorbic acid; autoimmune gastritis; bariatric surgery; calcium deficiency; cobalamin deficiency; Helicobacter pylori; iron deficiency; magnesium deficiency; micronutrients; pernicious anemia; proton pump inhibitors

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Micronutrient deficiencies, particularly iron and cobalamin, are common and can lead to serious consequences if not promptly treated. The stomach plays a crucial role in maintaining the balance of important hematopoietic micronutrients, including iron and cobalamin, through gastric acid secretion. Pathological conditions and medications can interfere with the stomach's function, highlighting the importance of investigating the stomach in patients with micronutrient deficiencies.
Micronutrient deficiencies are relatively common, in particular iron and cobalamin deficiency, and may potentially lead to life-threatening clinical consequences when not promptly recognized and treated, especially in elderly patients. The stomach plays an important role in the homeostasis of some important hematopoietic micronutrients like iron and cobalamin, and probably in others equally important such as ascorbic acid, calcium, and magnesium. A key role is played by the corpus oxyntic mucosa composed of parietal cells whose main function is gastric acid secretion and intrinsic factor production. Gastric acid secretion is necessary for the digestion and absorption of cobalamin and the absorption of iron, calcium, and probably magnesium, and is also essential for the absorption, secretion, and activation of ascorbic acid. Several pathological conditions such as Helicobacter pylori-related gastritis, corpus atrophic gastritis, as well as antisecretory drugs, and gastric surgery may interfere with the normal functioning of gastric oxyntic mucosa and micronutrients homeostasis. Investigation of the stomach by gastroscopy plus biopsies should always be considered in the management of patients with micronutrient deficiencies. The current review focuses on the physiological and pathophysiological aspects of gastric acid secretion and the role of the stomach in iron, cobalamin, calcium, and magnesium deficiency and ascorbate homeostasis.

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