Grains & Cereals — FODMAP Guide
Grains, breads, and cereals rated for FODMAP content
Low FODMAP (Safe)
No. Buckwheat is low-FODMAP and safe for IBS despite its misleading name — it is not related to wheat and is naturally gluten-free. Buckwheat groats, flour, and soba noodles (100% buckwheat) are all safe at standard servings. It is an excellent nutritious grain alternative for the low-FODMAP diet.
No. Corn tortillas are low-FODMAP and one of the best bread alternatives for people with IBS. Made from corn masa flour, they contain no wheat or fructans. Two regular-sized corn tortillas per serving are safe. They are a staple for IBS-friendly tacos, wraps, and quesadillas.
No. Most gluten-free breads made from rice flour, corn starch, or potato starch are low-FODMAP and safe for people with IBS. A standard serving of 2 slices is generally well tolerated. Note that it is the fructans in wheat, not gluten itself, that trigger IBS symptoms.
No. Millet is low FODMAP and a safe gluten-free grain for people with IBS. It is well tolerated at standard serving sizes and provides good nutritional value including protein, fiber, and minerals. Millet works well as a rice substitute or in porridge and baked goods.
No. Oats are considered low-FODMAP and are a safe breakfast staple for most people with IBS when eaten in moderate portions (up to about 1/2 cup dry or 52g). They provide soluble fiber that may actually support gut health. Ensure they are labeled gluten-free if you also have celiac concerns.
No. Popcorn is low FODMAP at up to 7 cups popped (about 56g) and is one of the safest and most IBS-friendly snacks available. Plain, air-popped popcorn provides whole-grain fiber without significant fermentable carbohydrates. It is an excellent alternative to high-FODMAP snacks.
No. Quinoa is considered low-FODMAP and is a safe, nutritious, high-protein grain alternative for people with IBS. It is well tolerated at standard serving sizes (about 1 cup cooked or 155g). Most people can enjoy it freely as a versatile base for meals without experiencing digestive symptoms.
No. Rice is one of the safest staple foods on a low-FODMAP diet, and white, basmati and jasmine rice are effectively FODMAP-free — milling removes the bran, leaving almost pure starch, so there is no practical serving limit. Brown rice is the one variety with a figure attached: it keeps its bran, which carries some fructans and GOS, and Monash rates it low-FODMAP at 1 cup cooked.
No. Rice noodles are low-FODMAP at a generous serving and are the single most useful swap for anyone who misses wheat pasta or noodles. Monash rates them low at 220g cooked. If a bowl of pho or pad thai still causes trouble, the noodles are almost never the reason — look at the broth, which is usually built on onion and garlic, and at the sauce.
Moderate FODMAP (Portion-Dependent)
Sometimes. Granola's FODMAP status depends heavily on its ingredients. Plain oat-based granola may be safe at about 1/4 cup (23g), but most commercial granolas contain honey, dried fruit, wheat, and other high-FODMAP ingredients that make them problematic. Always check the ingredient list carefully.
It depends on the preparation. Traditionally fermented sourdough has reduced fructan content because the long fermentation process breaks down FODMAPs. Spelt sourdough is generally the best tolerated. However, many commercial "sourdough" breads use shortcuts and may still be high in fructans. Check for genuine long-fermented varieties.
It depends on the type and portion. Spelt sourdough bread is better tolerated than regular spelt bread because the long fermentation process reduces fructan content. One slice (about 26g) of spelt sourdough may be low FODMAP, but regular spelt bread is similar to wheat bread in its FODMAP load.
High FODMAP (Avoid or Limit)
Yes. Barley is high in fructans and carries GOS on top, and Monash finds it high-FODMAP even at small servings — there is no comfortable elimination-phase portion. What makes barley particularly awkward is that it rarely announces itself: it hides in soups, stews, stock, malt vinegar, malted drinks, breakfast cereals and beer, where the label says "malt" or "pearl barley" halfway down a long list.
Yes. Couscous is not a grain in its own right — it is tiny granules of durum wheat semolina, which makes it a concentrated source of fructans. Monash rates couscous as high-FODMAP at a standard serving. It is one of the most commonly missed wheat products, because it looks like a grain such as quinoa or millet rather than like pasta.
Yes. Regular wheat pasta is high FODMAP due to fructan content from the wheat flour. Even cooked al dente pasta retains significant fructans. Gluten-free pasta made from rice, corn, or quinoa is a safe low-FODMAP alternative. Small portions of cooked wheat pasta (about 100g) may be tolerated by some.
Yes. Rye bread is high-FODMAP because rye grain is very high in fructans. Even one slice can trigger bloating, gas, and cramping in people with IBS. Rye contains more fructans than wheat, making rye bread one of the worst bread choices for IBS. Choose sourdough spelt bread or gluten-free bread instead.
Yes. Wheat is high in fructans and is one of the most common dietary IBS triggers worldwide, found in bread, pasta, cereal, and countless processed foods. Even moderate amounts can cause bloating, gas, and pain. Gluten-free or spelt sourdough alternatives are recommended during the elimination phase.
Yes. White bread is made from wheat flour, which is high in fructans — one of the most common IBS triggers. Even one slice of standard white bread can contain enough fructans to trigger bloating, gas, and cramping. Sourdough bread is a much better alternative because the long fermentation process breaks down most of the fructans.
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