lifestyle · for gut health & ibs
Low-FODMAP Diet
Reviewed by the Nimbera editorial team · Last updated May 2026
How to use
Phase 1 (2-6 weeks): Eliminate high-FODMAP foods - wheat, garlic, onion, lactose, apples, pears, stone fruits, legumes, mushrooms, cauliflower, and high-fructose sweeteners. Phase 2 (6-8 weeks): Systematically reintroduce one FODMAP subgroup at a time to identify personal triggers. Phase 3: Personalize the long-term diet based on individual tolerance. Work with a registered dietitian for best results.
How it works
FODMAPs (Fermentable Oligosaccharides, Disaccharides, Monosaccharides, And Polyols) are short-chain carbohydrates poorly absorbed in the small intestine. In IBS, they rapidly ferment in the colon, producing gas and drawing fluid into the bowel via osmosis, triggering pain, bloating, and altered bowel habits. Reducing FODMAP load decreases fermentation substrate and symptom severity.
Where to buy
The Monash University FODMAP Diet App ($10-13 one-time, iOS/Android) is the gold standard resource developed by the researchers who created the diet. No specific food products to purchase; it is a dietary modification approach available at standard grocery stores.
Typical cost: $0-15 for the app; standard grocery budget
Safety notes
The low-FODMAP diet is nutritionally restrictive if followed long-term without completing the reintroduction phase. Work with a dietitian to avoid nutrient deficiencies (calcium, fiber, B vitamins). The elimination phase should not exceed 6-8 weeks as it reduces gut microbiome diversity. Not recommended without professional supervision for those with a history of disordered eating.
Drug & supplement interactions
- Always tell your doctor or pharmacist about any supplements you take.
- Interactions can occur with prescription medications, blood thinners, and immunosuppressants.
- Herbal remedies can affect how the body absorbs or metabolises drugs.
- Check drugs.com interactions checker before starting.
Clinical source
Halmos EP 2014 - Gastroenterology (PMID 24076059)This information is compiled from primary clinical literature and is for informational purposes only. It is not a substitute for professional medical advice. Read our full disclaimer.