Is Sourdough Bread Good for Gas?

Partly: sourdough bread may cause less gas for some people when fermentation reduces the fructans that gut bacteria turn into gas. A 2023 review of sourdough bread’s health effects found that changes in bread components depend on how the bread is made, and evidence of a meaningful benefit for symptoms remains limited.

Can sourdough bread help with gas?

Sourdough bread may be worth trying if you notice gas after eating wheat bread and want to see whether a different bread agrees with you. It is not a proven treatment for gas, and some sourdough bread can still cause symptoms.

The result depends on the flour, fermentation process, portion and your individual tolerance. For other options to consider, see the best foods for gas.

How could sourdough bread affect gas?

Wheat and rye contain fructans, carbohydrates in the FODMAP group. Fructans are poorly absorbed in the small intestine and can be fermented by bacteria in the large intestine, producing gas. In people who are sensitive to this process, gas may accompany bloating or discomfort.

During sourdough fermentation, microorganisms can break down some fructans before the bread is baked. If enough fructans are reduced, the finished sourdough bread may be easier for some people to tolerate than a bread with more fructans.

That reduction is not guaranteed. Recipes, microorganisms and fermentation conditions differ, so the word “sourdough” on a package does not establish that a bread is low in fructans. Whole-grain sourdough bread also contains fiber, which can contribute to gas for some people, particularly after a sudden increase in fiber intake.

Gas can have causes beyond bread, including other foods and swallowed air. If you are also considering what to drink, see the best drinks for gas.

What does the evidence say about sourdough bread and gas?

The 2023 review describes how sourdough fermentation can modify components of grains that may cause adverse reactions. It also notes that many proposed benefits are based on chemical or laboratory findings, making it difficult to know whether they translate into noticeable improvements for people.

There is not enough evidence here to say that sourdough bread consistently reduces gas compared with other bread, or to predict which product will work for a particular person. A lower fructan content is a plausible explanation for better tolerance, not proof that every loaf will relieve symptoms.

Sourdough bread may still contain other ingredients that affect tolerance. Equally, feeling less gassy after switching breads does not establish which difference in the breads caused the change.

How can you try sourdough bread for gas?

If you do not need to avoid its ingredients for medical reasons, try sourdough bread in place of your usual bread rather than simply adding more bread to your diet. Start with a small portion and notice how you feel before deciding whether to have more.

Choose a bread with a straightforward ingredient list so it is easier to identify possible triggers. Toppings and fillings matter too: for example, onion or garlic in a spread may contribute to gas even if the bread itself is well tolerated.

Keep a brief record of the bread, portion, other foods eaten and any symptoms. Compare similar meals when possible, and avoid drawing a conclusion from a single experience: gas can vary from day to day for reasons unrelated to bread.

If you are following a medically advised low-FODMAP diet, look for a product verified as low FODMAP and follow its labeled serving guidance. A long fermentation or a particular flour alone does not guarantee that sourdough bread meets that standard. A dietitian can help you assess tolerance without unnecessarily restricting your diet.

Who should be careful, and when should you seek care?

People with celiac disease must avoid sourdough bread made with gluten-containing grains such as wheat, rye or barley. Fermentation does not make ordinary wheat or rye sourdough bread safe for celiac disease. If you think you might have celiac disease, speak with a clinician before removing gluten, because testing generally requires you to be eating it.

People with a wheat allergy should avoid sourdough bread containing wheat. Seek emergency help for signs of a severe allergic reaction, such as throat swelling, trouble breathing or fainting after eating.

Speak with a clinician about persistent or recurrent gas, especially if it comes with blood in the stool, unexplained weight loss or a lasting change in bowel habits. Severe abdominal pain or swelling, vomiting, or an inability to pass stool or gas needs urgent medical assessment.

For children, or during pregnancy, discuss persistent digestive symptoms and major dietary restrictions with a healthcare professional rather than relying on sourdough bread as a solution.