Why Garlic and Onions Cause Digestive Distress - The Low-FODMAP Story

Why Garlic and Onions Cause Digestive Distress

The Science Behind Fructans and the Low-FODMAP Diet
For many, garlic and onions are essential culinary staples that enhance the flavor of almost any dish...

The Origin: A Scientific Discovery

In the late 1980s, Australian dietitian Dr. Sue Shepherd, while working at Monash University...

The Common Link: Fructans and FODMAPs

Garlic and onions are among the richest natural sources of a specific short-chain carbohydrate called fructans.

How Fructans Affect the Digestive System:

  1. Lack of Enzymes: Humans lack the necessary digestive enzymes...
  2. Water Retention: Unabsorbed fructans draw significant amounts of water...
  3. Rapid Fermentation: Resident bacteria rapidly ferment these sugars...

The Creation of the Low-FODMAP Diet

  • F - Fermentable
  • O - Oligosaccharides (e.g., fructans in garlic and onions)
  • D - Disaccharides (e.g., lactose)
  • M - Monosaccharides (e.g., excess fructose)
  • P - Polyols (e.g., sugar alcohols)

Key Takeaway & Medical Advice

Experiencing discomfort from garlic and onions indicates an underlying gut sensitivity...

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