Other Dietary Confounders: FODMAPS et al

Area of Science:

• Gastroenterology and Nutritional Science
• Wheat and Cereal Component Analysis

Background:

• Wheat ingestion is frequently linked to gastrointestinal symptoms like bloating and abdominal pain.
• The specific wheat component responsible for these symptoms remains poorly understood.

Purpose of the Study:

• To investigate the complex relationship between wheat components and associated symptoms.
• To critically evaluate the attribution of symptoms to gluten versus other wheat constituents.

Main Methods:

• Review of existing literature on wheat intolerance and symptom triggers.
• Analysis of re-challenge studies using different wheat fractions (e.g., gluten, carbohydrates).
• Consideration of candidate components beyond gluten, including fructans and other proteins.

Main Results:

• Attention has largely focused on gluten, but re-challenge studies often use whole wheat products.
• Carbohydrate-depleted gluten challenge in non-coeliac gluten sensitivity primarily induced mood symptoms, not gut issues.
• Other wheat components like fructans, amylase-trypsin inhibitors, and exorphins are potential symptom triggers.

Conclusions:

• Coeliac disease is the only established condition definitively linked to gluten.
• Misattributing symptoms to gluten can lead to incorrect dietary advice and contribute to the rise of gluten-free diets.
• Further research is needed to dissect the specific effects of various wheat components to guide accurate therapeutic recommendations.