Is Sourdough Bread Good for Indigestion?

Partly: sourdough bread may be easier to tolerate if fructans trigger your symptoms, because fermentation can reduce these fermentable carbohydrates, but it is not a proven treatment for indigestion. The available research is mainly laboratory work, not clinical evidence that sourdough bread relieves symptoms. If you want to try it, start with a small portion and pay attention to how you feel.

Is sourdough bread a good choice for indigestion?

Sourdough bread may suit some people better than other bread, particularly if they are sensitive to fructans. But tolerance varies, and a sourdough label does not guarantee that a loaf is low in fructans or easier to digest.

Indigestion usually refers to discomfort in the upper abdomen, such as feeling uncomfortably full after eating. Bloating and gas can overlap with it, but they can also occur for other reasons. Sourdough bread is one possible food to consider alongside the best foods for indigestion, not a remedy that works for everyone.

How might sourdough bread affect digestion?

Sourdough bread is made using a starter containing yeast and lactic acid bacteria. During fermentation, these organisms change some carbohydrates and proteins in the dough. Depending on the recipe and process, fermentation can reduce fructans, carbohydrates found in wheat and some other grains.

Fructans pass into the large intestine, where bacteria ferment them and produce gas. People who are sensitive to them may experience bloating or discomfort. A bread with less fructan could be easier for some of these people to tolerate, although that does not establish that it will relieve upper-abdominal indigestion.

Not all sourdough bread is made the same way. Flour, starter and fermentation conditions can affect the finished loaf, and its sour flavor alone does not tell you how much fructan remains. Sourdough bread can also cause discomfort in some people; for example, its acidity may aggravate reflux symptoms for someone who is sensitive to acidic foods.

What does the evidence say about sourdough bread?

A 2024 laboratory study of low-FODMAP sourdough bread examined specially prepared breads in simulated digestion and colonic fermentation. FODMAPs are fermentable carbohydrates that include fructans. The study did not test whether eating the breads improved indigestion in people.

A 2022 study of sourdough bread digestibility also used laboratory methods to examine how factors such as flour, starters and processing affected starch and protein digestion. Its findings suggest that how sourdough bread is made matters, but simulated digestibility is not the same as symptom relief after a meal.

Together, these studies provide a reason to investigate sourdough bread further, not proof that it treats indigestion. There is no reliable way to predict from these results which loaf, if any, will help an individual feel better.

How can you try sourdough bread for indigestion?

If you can safely eat its ingredients, try a small slice of sourdough bread in place of your usual bread. Choose a plain preparation at first, rather than adding rich or spicy toppings that might make it harder to tell what affects your symptoms.

Notice whether you feel comfortable afterward and whether the same pattern occurs on another occasion. A food-and-symptom note can help you discuss recurring problems with a clinician or dietitian. If sourdough bread makes you feel worse, there is no reason to keep eating it for indigestion.

If you suspect fructans are a problem, a dietitian can help assess whether a low-FODMAP approach is appropriate and guide food reintroduction. Do not assume that all sourdough bread is low-FODMAP; look for a loaf specifically labeled or certified as such if that distinction matters to your diet.

What you drink with a meal can matter to comfort too; see the best drinks for indigestion for options.

Who should be careful, and when should you see a doctor?

Sourdough bread made from wheat, rye or barley is not safe for someone with celiac disease just because it has been fermented. People with celiac disease should choose sourdough bread labeled gluten-free and consider cross-contact; people with a wheat allergy must also check that it contains no wheat. If you have another diagnosed food allergy, check the ingredients before trying it.

See a clinician for indigestion that keeps coming back or does not improve, or if you have trouble swallowing, repeated vomiting or unexplained weight loss. Seek emergency care for chest pain, especially with breathlessness or pain spreading to the arm or jaw, or for severe abdominal pain, vomiting blood or black, tarry stools.

During pregnancy, or when a child has persistent symptoms, ask a clinician for advice rather than relying on a change of bread. If you take medication for digestive symptoms, do not stop it without consulting your prescriber.