Wheat

High FODMAP

By Michael EisenwasserUpdated September 22, 2026

Serving sizes

Wheat changes rating with portion size. Its rating is estimated from what it is made of, so the servings are described rather than weighed.

Small serving Moderate
Moderate serving High
Large serving High

Fructans

Wheat is High FODMAP, one of the main grains that carries a fermentable carbohydrate right in the flour.

Wheat is a primary source of Fructans, and they climb fast with serving size: a small serving is already moderate, and a moderate to large serving lands squarely in the high range.
It turns up in most breads, pasta, couscous, crackers, and baked goods, so the flour itself is what drives the level rather than any single dish.

When you want that bread-and-pasta comfort, naturally gluten-free staples like rice, oats, quinoa, or a certified gluten-free version keep things easy on your gut.

Why wheat is rated high

Wheat is high FODMAP, and the driver is fructans, which sit in the flour itself rather than in anything added to it. It never reads low: a small serving is already moderate, and a moderate serving is high, where it stays at a large serving. That climb is why ordinary bread, pasta, couscous, crackers and baked goods all land in the same place. The grain is the source, so swapping the dish without swapping the flour changes very little.

What changes your risk

Serving size The fructan load tracks the amount of wheat flour on the plate, and the climb is steep. A small serving is already moderate, so there is no amount that reads low and no portion that can be treated as a free pass.
A sourdough label A wheat loaf sold as sourdough is still wheat, and the label alone tells you nothing about how it behaves. Judge it the same way as any other wheat bread.
Stacking with other fructan foods Wheat rarely arrives alone. Bread with onion in the filling, pasta in a garlic sauce, or a sandwich followed by a rye cracker all pile fructans into the same few hours, and the total is what matters, not each item on its own.
Cooking does not help Boiling, baking, toasting and freezing do not destroy fructans. Pasta water is the one place anything can leach out, but nothing about heat itself lowers the load, so a longer bake or a well done crust changes nothing.
Hidden wheat in the background Thickened sauces, gravy, stock cubes, crumbed coatings, soups and battered food often carry wheat flour that never appears on the menu description. Checking those is usually worth more than adjusting the visible bread.

Swaps

For the bread role, gluten free bread fills the gap, and many gluten free loaves toast up close to the real texture. For pasta, gluten free pasta made from rice or corn behaves much like the original, and rice, quinoa, polenta and buckwheat all stand in for couscous in a salad or alongside a stew. Oats work for breakfast where a wheat cereal used to sit. Rye and barley are not swaps: they carry fructans for the same reason wheat does, so rye bread, barley in soup and pearl barley salads belong in the same group. One thing worth checking on gluten free packaging is inulin or chicory root fibre, which is added to some loaves and bars and is high in fructans even though the wheat is gone.

How to lower the load

When buying gluten free bread, read the ingredient list for inulin, chicory root fibre and added legume flours rather than trusting the front of the pack. Gluten free bread freezes well and toasts straight from frozen, which is worth doing because it stales fast. When eating out, the reliable moves are choosing rice or potato as the base, asking for sauces on the side since wheat flour is a common thickener, and skipping the bread basket rather than trying to take a smaller amount of it. Recipes that lean on wheat for body, such as a roux, can be thickened with cornflour or rice flour instead.

Common questions

is wheat high fodmap

Yes. Wheat is high FODMAP overall, and fructans are the reason. A small serving is already moderate and a moderate serving is high.

how much wheat can i eat on the elimination phase

Wheat has no low serving, so there is no amount that comes in low. A small serving is moderate, which is why wheat based bread, pasta and couscous are usually left out during elimination and reintroduced later with a dietitian.

is sourdough bread ok on a low fodmap diet

A loaf called sourdough is still made from wheat, so it is judged the same way as other wheat bread here. Gluten free bread is the more dependable choice during elimination.

is wheat high in fructans

Yes, fructans are the FODMAP group in wheat and they are what drives the rating. They are in the flour, so bread, pasta, crackers and baked goods all carry them.

Learn more

Where this rating comes from

Wheat has an estimated rating. Our sources have no direct measurement of it, so its rating is worked out from its ingredients and composition and from the closest measured foods, then checked a second time. The low, moderate and high cutoffs are those of Varney et al. (2017).

Feedback sent through the FODMAP Foods app has led to changes in this list.

See our full rating method →

Sources

Fructan and free fructose content of common Australian vegetables and fruit. Muir et al. (2007), J. Agricultural and Food Chemistry 55(16):6619-6627.
Measurement of short-chain carbohydrates in common Australian vegetables and fruits by high-performance liquid chromatography (HPLC). Muir et al. (2009), J. Agricultural and Food Chemistry 57(2):554-565.
Quantification of fructans, galacto-oligosaccharides and other short-chain carbohydrates in processed grains and cereals. Biesiekierski et al. (2011), J. Human Nutrition and Dietetics 24(2):154-176.
Dietary sorbitol and mannitol: food content and distinct absorption patterns between healthy individuals and patients with irritable bowel syndrome. Yao et al. (2014), J. Human Nutrition and Dietetics 27(Suppl 2):263-275.
FODMAPs: food composition, defining cutoff values and international application. Varney et al. (2017), J. Gastroenterology and Hepatology 32(Suppl 1):53-61. Supplies the low, moderate and high cutoffs used on this page.