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Intestinal malabsorption of carbohydrate — Clinical Guidelines

Overview

Intestinal malabsorption of carbohydrates involves impaired digestion and absorption of specific carbohydrates, leading to symptoms such as bloating, diarrhea, and abdominal pain. Common causes include lactose intolerance and small bowel bacterial overgrowth. 1 2

Diagnosis

Breath Tests: Hydrogen (H2) and methane breath tests are recommended for diagnosing carbohydrate malabsorption, particularly lactose intolerance. 1 2

Symptom Evaluation: Concurrent validated symptom assessment is essential to establish carbohydrate intolerance alongside breath test results. 1

Confounding Factors: Consider potential confounding factors when interpreting breath tests, especially for oro-cecal transit time and small bowel bacterial overgrowth. 1

Methodological Considerations: Proper preparation and standardized methodology are crucial for reliable breath test results. 2

Management

Dietary Modifications: Elimination diets reducing specific carbohydrates (e.g., lactose) are first-line treatments. 1 2

Supplementation: Enzyme supplements (e.g., lactase for lactose intolerance) can aid in digestion. 1

Symptom Monitoring: Regular monitoring of symptoms alongside dietary adjustments is recommended to assess efficacy. 2

Special Populations

Pediatrics: Breath testing in children requires careful methodological adherence and symptom correlation for accurate diagnosis. 2

No Specific Guidance: Abstracts do not provide specific recommendations for pregnancy or elderly populations regarding carbohydrate malabsorption management. 1 2

Key Recommendations

Breath tests for diagnosing carbohydrate malabsorption should be complemented by validated symptom evaluation to confirm intolerance. (Evidence: Moderate) 1

Proper preparation and standardized methodology are essential for the accurate performance of breath tests in both adults and pediatric patients. (Evidence: Expert opinion) 2

Dietary modifications, including elimination of specific carbohydrates and supplementation with appropriate enzymes, are recommended first-line treatments. (Evidence: Expert opinion) 1 2

References

1 Hammer HF, Fox MR, Keller J, Salvatore S, Basilisco G, Hammer J et al.. European guideline on indications, performance, and clinical impact of hydrogen and methane breath tests in adult and pediatric patients: European Association for Gastroenterology, Endoscopy and Nutrition, European Society of Neurogastroenterology and Motility, and European Society for Paediatric Gastroenterology Hepatology and Nutrition consensus. United European gastroenterology journal 2022. link 2 Broekaert IJ, Borrelli O, Dolinsek J, Martin-de-Carpi J, Mas E, Miele E et al.. An ESPGHAN Position Paper on the Use of Breath Testing in Paediatric Gastroenterology. Journal of pediatric gastroenterology and nutrition 2022. link

Intestinal malabsorption of carbohydrate