Lactose intolerance: problems in diagnosis and treatment

Area of Science:

• Gastroenterology
• Human Physiology
• Dietary Science

Background:

• Lactose malabsorption and lactase deficiency are chronic conditions causing abdominal pain, distention, flatulence, and diarrhea.
• These conditions share similar symptoms with Irritable Bowel Syndrome (IBS), a functional gastrointestinal disorder.
• Diagnostic challenges exist for lactose intolerance, leading to potential misdiagnosis as IBS.

Purpose of the Study:

• To highlight the diagnostic difficulties in differentiating lactose malabsorption from IBS.
• To underscore the impact of misdiagnosis on patient management and treatment.
• To emphasize the effectiveness of dietary intervention for lactose intolerance.

Main Methods:

• Lactose malabsorption can be identified via breath hydrogen tests or jejunal biopsy.
• Confirmation of lactose intolerance requires a food challenge with lactose-containing products.
• Comparison of symptom complexes between lactose intolerance and IBS.

Main Results:

• The similar symptom profiles of lactose intolerance and IBS contribute to frequent misdiagnoses.
• The actual rate of misdiagnosis varies depending on the diagnostic methodologies employed.
• A lactose-free diet is highly effective in alleviating symptoms for most lactose-intolerant individuals.

Conclusions:

• Accurate diagnosis of lactose malabsorption is crucial to avoid misclassification as IBS.
• Understanding the link between lactose intake and symptoms is key for managing lactose intolerance.
• Proper diagnosis and dietary management can resolve symptoms in the majority of affected patients.