Principles of macro- and micronutrient absorption

Overview

Nutritional assessment and support in gastroenterology requires understanding both macronutrient (protein, carbohydrate, fat) and micronutrient (vitamins, trace elements) requirements, and how specific GI diseases predispose to specific deficiency patterns based on the site of digestion/absorption affected
Malnutrition is common and under-recognised in patients with chronic GI disease (IBD, malabsorptive disorders, chronic liver disease, post-surgical short bowel), and screening should be routine rather than reserved for overtly underweight patients

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