Is there a link between sourdough bread and diabetes? - BReD (2024)

Eleven million Canadians live with diabetes or prediabetes. Those with diabetes can’t produce insulin or properly use the insulin it produces. Insulin is a hormone the pancreas produces. It regulates the amount of glucose (sugar) in the blood.

Regulating our blood sugar ensures our body functions properly. Too much blood sugar can cause damage to organs, blood vessels, and nerves. We also need insulin to use sugar for energy.

Refined or processed sources of carbohydrates such as white flour, cereals, white rice, potatoes, and pasta can have the biggest impact on blood sugar for people with type 2 diabetes because they can spike blood sugar levels. This can lead to an assumption they should avoid eating many carbohydrates.

Could sourdough bread help manage diabetes?

Fortunately, sourdough bread can be good for people who have or are predisposed to diabetes. Research suggests not only is sourdough an ideal part of a balanced diet, but it can also help to manage blood sugar levels and provide other benefits, which is important when dealing with diabetes.

Many types of breads are available and have varied nutritional value. Highly processed white breads are not healthy—for anyone. Breads with whole grains—especially those produced through a long and slow fermentation as with sourdough—are high in fibre and contain micronutrients in a form that can be more easily digested.

It will take time to discover the bread that’s suitable for you. Homemade breads and loaves or those from artisanal bakeries like ours are less processed and won’t contain additives (including sugar) common in industrial breads.

Is there a link between sourdough bread and diabetes? - BReD (1)

Insoluble fibre (which can’t be digested by the human gut) found in breads made from whole grain flours is important in promoting a healthy gut microbiota. Diverse and healthy microbes in our gut have positive effects on our health. Insoluble fibre provides food for these microbes. They aid digestion and support a healthy immune system.

In a study linking the actions of gut bacteria with people at risk of type 2 diabetes, higher blood levels of indolepropionic acid were associated with those who did not develop diabetes. Our gut bacteria makes indolepropionic acid. These acid levels appeared to be positively linked to the amount of fibre and whole grains in the study participants’ diets.

Fermentation methods and the way flour is milled influence how we digest bread and assimilate it in our bodies. A Canadian study found blood sugar levels in overweight men showed a smaller spike after eating sourdough bread when compared with yeasted breads. Additional research suggested sourdough breads made with flours milled from sprouted grains are even more beneficial than either white or wholemeal sourdough bread.

Eating whole grain or sprouted grain sourdough breads can moderate blood sugar response. Sourdough’s fermentation process and fibre can have benefits for digestion and the immune system.

Along with a whole-food, plant-based diet, sourdough can help to slow down the rate of assimilation of carbohydrates. Keeping your blood sugar levels even can also lower inflammation and hormone fluctuations.

Visit our rotating sourdough bread schedule. You can also learn our favourite dutch ovens for baking sourdough, and how to store sourdough bread & keep it fresh.

Is there a link between sourdough bread and diabetes? - BReD (2024)

FAQs

Is there a link between sourdough bread and diabetes? - BReD? ›

Sourdough bread is made through a slow fermentation process, which may cause this type of bread to raise blood sugar more slowly than other breads. As a result, sourdough bread could be a great choice for those with diabetes. Whole grain sourdough bread is the best sourdough bread for diabetics.

Should diabetics eat sourdough bread? ›

People with diabetes can eat sourdough bread or any other bread that fits into their dietary plan. That said, because sourdough bread has a lower glycemic index than other bread varieties, it can be a particularly good choice if you're watching your blood sugar levels.

What is the healthiest bread for diabetics? ›

Choose whole-grain varieties — the first ingredient on the label should be “whole.” Examples include whole wheat, whole oat, and whole rye. Look for bread that contains at least 3 g of fiber per slice. If you're using two slices of bread to make a sandwich, make sure each slice has less than 100 calories.

What is the glycemic index of a slice of sourdough bread? ›

Sourdough bread has a GI rating of 54 and a GL rating of 8, while bread made from white wheat flour has a GI rating of 71 and a GL rating of 9. This combination of a GI rating of 54 and a GL rating of 8 puts sourdough bread in a low GI category, according to international tables. Learn more about GI here.

Is it okay to eat sourdough bread every day? ›

Health benefits of sourdough. The type of flour used — all-purpose, whole wheat, rye — can affect the nutritional content of sourdough bread, says Wee. But generally speaking, sourdough bread is a healthy option and can be eaten regularly as part of a nutritious, balanced diet.

Which bread has the lowest glycemic index? ›

Whole wheat bread typically has a lower GI compared to white bread, making it a healthier option. Look for bread labeled as "100% whole wheat" to ensure you are getting the full nutritional benefits.

Why is there no sugar in sourdough bread? ›

In short, no sourdough bread does not need sugar. What is this? It should consist of just flour, water, salt and of course sourdough starter (which is essentially flour and water). The yeast and bacteria in your sourdough starter actually feed off the sugar from the starches in the flour.

What are the 5 worst foods for blood sugar? ›

You limit dairy products, red meat, sweets, added sugars, sodium (salt), and highly processed foods. Some additional guidelines include focusing on seasonal produce and reading food labels to help you avoid added sodium and sugar.

What bread does not spike sugar? ›

Unlike refined white bread, which can cause rapid spikes in blood sugar levels, whole grain, and whole wheat bread contain complex carbohydrates and fiber. These components slow down glucose absorption, leading to a more gradual and steady rise in blood sugar, making them a better choice for individuals with diabetes.

Are bananas good for diabetics? ›

Bananas are a delicious, nutritious and affordable food for everyone, including those with diabetes. Eating this healthy fruit can help stabilize blood sugar levels, improve insulin sensitivity and improve heart health.

Is sourdough bread inflammatory? ›

The best bread to reduce gut inflammation is bread made from whole grains. Refined grains, such as the grains found in white bread and white pasta, are known to increase inflammation across the whole body. Sourdough bread and rye bread are both good options for an anti-inflammatory diet.

Is peanut butter good for diabetics? ›

Peanut butter contains essential nutrients, and it can be part of a healthful diet when a person has diabetes. However, it is important to eat it in moderation, as it contains a lot of calories. People should also make sure their brand of peanut butter is not high in added sugar, salt, or fat.

Are eggs good for diabetics? ›

Eggs are a nutritious choice for people with diabetes

Protein-rich foods can play an important role in regulating blood sugar levels and improving glucose control. A serving of two large eggs contains 13 grams of high-quality protein, making eggs an excellent choice to include at meals and snacks.

Who should not eat sourdough bread? ›

Just remember that sourdough fermentation doesn't degrade gluten completely. So if you have celiac disease or non-celiac gluten sensitivity, it's best to avoid sourdough bread made from wheat, barley, or rye, all of which contain gluten.

Which sourdough bread is the healthiest? ›

Whole wheat sourdough bread is one of the healthiest types of sourdough breads. Any sourdough bread with whole grains is considered healthier to classic sourdough bread.

What are the pros and cons of sourdough bread? ›

While sourdough bread is usually lower in gluten, it is not gluten-free. People with a gluten intolerance may find that sourdough is easier to digest, but people with celiac disease will likely still experience symptoms if they eat sourdough bread.

Is sourdough bread high in sugar? ›

Sourdough bread doesn't contain sugar, while ordinary sandwich bread often does. Otherwise, the macronutrients depend on the kind of flour used. Whole wheat flour will generally contain more fiber than white flour. Enriched flour will also have vitamins and minerals to offer.

Is sourdough healthier than white bread? ›

The bottom line. Sourdough is a healthier alternative to regular white or whole wheat bread. Although it has comparable nutrients, the lower phytate levels mean it is more digestible and nutritious. The prebiotics also help to keep your gut bacteria happy, and it may be less likely to spike blood sugar levels.

Is sourdough bread good for low glycemic diet? ›

Sourdough wheat bread thus falls into a low GI food category level. One of the components of the traditional Mediterranean diet, wholemeal sourdough bread is part of a low GI diet.

What is a good substitute for bread for diabetics? ›

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  • Lettuce wraps. A good substitute for pita bread or tortilla wraps is lettuce. ...
  • Portobello mushroom buns. Large portobello mushrooms can be cooked and used like burger buns. ...
  • Bell pepper sandwich. ...
  • Cucumber sub. ...
  • Aubergine roll ups. ...
  • Almond bread.
Jan 15, 2019

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