The Basics of the FODMAP Diet: What You Need to Know for IBS Relief

Have you heard of the FODMAP diet? It's an increasingly popular eating approach, especially for those with irritable bowel syndrome (IBS) and other digestive issues. In this article, you'll learn what FODMAPs are, how the FODMAP diet works, and how it can help you reduce digestive discomfort and improve your well-being.

What are FODMAPs?

FODMAP stands for "Fermentable Oligo-, Di-, Monosaccharides and Polyols." In short, they are carbohydrates found in various foods that are difficult to digest in the small intestine. Due to their poor absorption, they travel to the large intestine, where they are fermented by bacteria. This can cause symptoms like bloating, abdominal pain, diarrhea, and constipation in sensitive individuals.

The main groups of FODMAPs are:

  1. Oligosaccharides: These include fructans and galacto-oligosaccharides (GOS) and are found in foods like wheat, rye, onions, garlic, and legumes.
  2. Disaccharides: Lactose is the primary disaccharide in this category and is found in milk and dairy products.
  3. Monosaccharides: Fructose is the primary monosaccharide and is found in high amounts in honey, agave syrup, fruit, and fruit juices.
  4. Polyols: These include sorbitol, mannitol, xylitol, maltitol, and isomalt. They are found in certain fruits like apples, pears, plums, and in sugar-free candies.

How does the FODMAP diet work?

The FODMAP diet is a three-step process:

  1. Elimination phase: In this phase, high-FODMAP foods are removed from the diet for 4-6 weeks. This aims to reduce digestive discomfort.
  2. Reintroduction phase: In this phase, FODMAP-containing foods are gradually and systematically reintroduced to the diet to test individual tolerance and identify which FODMAP groups trigger symptoms.
  3. Personalized FODMAP diet: Based on the findings from the reintroduction phase, an individualized long-term eating plan is developed that considers the FODMAPs that are best tolerated.

Who can the FODMAP diet help?

The FODMAP diet can particularly help those with irritable bowel syndrome (IBS), as studies have shown that 70-75% of sufferers experience significant improvement in their symptoms when following a low-FODMAP diet. Additionally, the FODMAP diet may also be helpful for other digestive disorders like Crohn's disease, ulcerative colitis, or functional dyspepsia.

It's important to emphasize that the FODMAP diet is not a cure-all and is not suitable for everyone. Before making a drastic change to your diet, always consult with your doctor or a qualified dietitian to ensure the FODMAP diet is appropriate for your individual needs.


The FODMAP diet is an evidence-based dietary strategy that can help alleviate digestive discomfort, particularly in those with irritable bowel syndrome. By eliminating or reducing hard-to-digest carbohydrates, it can help alleviate symptoms like bloating, abdominal pain, diarrhea, and constipation. Before starting the FODMAP diet, it's essential to seek guidance from a medical professional or dietitian to ensure it's suitable for your individual needs.

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