Sourdough Bread: 3 ways it may benefit your health

Sourdough bread may offer several health benefits thanks to its natural fermentation process, which can make it easier to digest, support steadier blood sugar levels, and improve nutrient absorption compared with conventional bread.

Unlike bread made with baker’s yeast, sourdough is produced through fermentation, where natural bacteria and yeast break down components in the flour. This process may change how the body responds to the bread.

Improved Digestion

One of the key benefits of sourdough is improved digestibility. Fermentation helps break down gluten and reduces compounds such as FODMAPs, phytates, tannins, and trypsin inhibitors, all of which can contribute to digestive discomfort in some people.

A 2023 review of multiple studies found that people who switched from standard yeast bread to sourdough reported better gastrointestinal comfort, suggesting it may be gentler on the gut.

Better Blood Sugar Control

Sourdough may also support more stable blood sugar levels. During fermentation, organic acids like lactic and acetic acid are produced, which slow the breakdown and absorption of starch.

This results in a lower glycaemic response compared with white bread. For example, sourdough has a lower glycaemic index than standard wheat bread, meaning it causes a slower rise in blood glucose after eating.

Improved Nutrient Absorption

Fermentation also helps reduce phytates, compounds that can bind to minerals such as iron, calcium, and magnesium and reduce their absorption.

Some studies suggest sourdough fermentation can significantly reduce phytic acid levels, potentially improving the body’s ability to absorb key nutrients from grain-based foods.

Nutrition Profile

A typical slice of sourdough (around 59g) provides carbohydrates for energy along with moderate protein, small amounts of fat, and several micronutrients including iron, folate, selenium, and B vitamins.

While it is not a low-calorie food, it can still fit into a balanced diet when eaten in moderation.

Risks and Considerations

Sourdough is not gluten-free and is unsuitable for people with coeliac disease or severe gluten intolerance.

However, gluten-free sourdough options made with alternative flours such as quinoa, buckwheat, or sorghum are available, though they tend to have a different texture.

Bottom Line

Thanks to fermentation, sourdough may be easier to digest, gentler on blood sugar, and better for mineral absorption than conventional bread. While not a health food on its own, it can be a more nutritious option within a balanced diet.

Note to readers: This article is for informational purposes only and not a substitute for professional medical advice. It is based on user-generated content from social media.