Demystifying Carbohydrate Maldigestion: A Clinical Review

Area of Science:

• Gastroenterology
• Digestive Health
• Gut-Brain Interaction

Background:

• Carbohydrate intolerance is a frequent cause of unexplained gastrointestinal symptoms, especially in patients with disorders of gut-brain interaction.
• Symptoms stem from bacterial fermentation of unabsorbed carbohydrates, increasing gas and osmotic load in the GI tract.
• This mechanism affects various carbohydrates like lactose, fructose, and FODMAPs (fermentable oligosaccharides, disaccharides, monosaccharides, and polyols).

Purpose of the Study:

• To explore carbohydrate intolerance as a cause of gastrointestinal symptoms.
• To discuss diagnostic approaches and management strategies for carbohydrate maldigestion.
• To highlight the role of dietary modification and enzyme replacement therapy.

Main Methods:

• Review of mechanisms of carbohydrate intolerance and maldigestion.
• Discussion of diagnostic tools including patient history, breath testing, and enzyme assays.
• Emphasis on dietary modification and enzyme replacement therapy.

Main Results:

• Carbohydrate maldigestion can be primary (inherited enzyme defects) or secondary (acquired damage to pancreas/small intestine).
• Confirmation of disaccharidase deficiency requires clinical correlation.
• Dietary modification is the primary treatment, aiming for symptom control with the most liberal diet possible.

Conclusions:

• Identifying patients with carbohydrate maldigestion is crucial for managing unexplained GI symptoms.
• A multidisciplinary approach involving dietitians is recommended for complex cases.
• Enzyme replacement therapy, like sacrosidase, can aid dietary management and symptom relief.