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Almost everyone has heard some version of it: “I ate bread every day in Italy and felt fine. Back home in Canada, one sandwich and I am bloated.” It is such a common story that a whole cottage industry has grown up around it, blaming “toxic” North American wheat, gluten, or glyphosate.

Here is the uncomfortable part for that narrative: the science points in almost the opposite direction, and the fear that glyphosate or “modern gluten” is behind these symptoms is not well supported by the evidence [10]. A great deal of what makes bread easy on your gut comes down to two things modern commercial flour does deliberately, namely adding enzymes and adding back nutrients. The artisan, “nothing added” loaf that many people reach for as the healthier choice is often the one missing both.

Let me walk through why.

Flour is not a finished product, it is a raw material with a problem

When wheat is milled, you get starch, protein (gluten), and fibre. What you do not reliably get is the right amount of enzyme activity. Enzymes such as amylase break starch into the simple sugars that yeast feeds on. Too little, and the dough cannot ferment properly, producing dense, gummy, poorly risen bread. Too much, as in sprout-damaged grain, and the dough turns sticky and slack.

Freshly milled modern flour tends to sit on the low end, so millers standardize it. The oldest and most common fix is malted barley flour, which is sprouted, dried barley that serves as a natural source of amylase [7]. If you read the label on a bag of commercial bread flour, you will often see it listed.

A good example is Ardent Mills’ Kyrol, a workhorse high-gluten bread flour used in bakeries across North America. Its entire ingredient statement is [1]:

Enriched Wheat Flour (Wheat Flour, Niacin, Reduced Iron, Thiamine Mononitrate, Riboflavin, Folic Acid), Malted Barley Flour.

That single line tells you two important things. The malted barley flour is added enzyme activity, and the “enriched” portion is added nutrition. Both are features rather than contaminants, and both matter for how you feel after eating.

What the enzymes actually do for your gut

The main job of added enzymes is baking performance: better rise, softer crumb, longer freshness. However, several of them also act on the exact components of wheat that cause digestive trouble.

Amylases break starch down into fermentable sugars. More fermentable sugar means a more active, complete fermentation, and fermentation is where much of the digestive benefit happens. During a proper rise, yeast and bacteria consume fructans, the fermentable fibres (FODMAPs) that are a genuine, well-documented cause of bloating and discomfort in many people who believe they are reacting to gluten. Bread given enough time and enzyme support to ferment fully ends up with meaningfully lower fructan levels [5][6].

Xylanases, added to many commercial flours and present in some malt, target arabinoxylans, the tough, viscous, poorly digested fibres in wheat [11]. In animal nutrition this effect is well established: adding xylanase to wheat-based feed lowers gut viscosity and improves nutrient digestibility [8][9]. The same chemistry applies to bread.

An important honesty check: these enzymes are largely destroyed by oven heat, so they are not working inside your body. Their benefit is that they have already pre-modified the starch and fibre in the dough, and enabled a fuller fermentation, before the loaf ever reaches you [7]. The finished bread is simply built from easier-to-handle material.

The artisan paradox

This is where the popular story gets flipped. Many artisan, organic, and specialty flours are sold on a “just wheat, nothing added” promise: no malt, no enzymes, and sometimes no fortification.

That can be a lovely thing in the hands of a skilled baker who compensates with long, slow fermentation, which is genuinely one of the best ways to make bread more digestible. A true sourdough proofed for 12 to 24 hours accomplishes with time what enzymes and yeast do faster in a commercial process [5][6].

But “artisan” on a shelf does not guarantee long fermentation. A quick-rise loaf made from unmalted, un-enzymed flour can actually be harder to digest than a standardized commercial loaf, because it has less complete fermentation, more intact fructans, and more viscous fibre. The label feels healthier. Your gut may disagree.

The part almost nobody talks about: fortification

Enzymes are about comfort. Fortification is about not getting sick.

In Canada, white flour is legally required to be enriched with five nutrients: thiamine, riboflavin, niacin, folic acid, and iron [2][3]. Selling unenriched white flour is in fact prohibited [2]. This is not a marketing gimmick; it is one of the most successful public-health measures we have. Milling strips these nutrients out, and enrichment puts them back. Folic acid fortification alone, introduced in 1998, cut neural-tube birth defects by roughly half [4]. Thiamine and niacin enrichment is why beriberi and pellagra are effectively history in this part of the world.

Here is the catch: the mandate applies to white flour. Whole grain, organic, and many artisan and specialty flours are exempt. So the very “clean-label” flours some people switch to for health reasons can quietly leave folic acid, iron, and B vitamins on the table, which is a real concern for anyone who is pregnant, iron-deficient, or eating a large amount of home-baked bread.

What about the grain itself?

A fair question is whether the wheat is simply different. It is, though not in the way the popular story imagines.

The natural enzyme content of a wheat kernel is shaped largely by the climate it ripens in. Cool, damp conditions near harvest raise endogenous alpha-amylase, the same starch-splitting enzyme millers otherwise add, while warm, dry, sound-finishing conditions keep it low [12][13]. Canadian prairie wheat finishes in dry, sound conditions, so it tends to be naturally low in these enzymes. That is a genuine quality virtue for storage and milling, and it is precisely why North American millers standardize their flour by adding malted barley and enzymes back in. Where some European wheat runs higher in natural enzyme activity, it owes this to a cooler, wetter maritime harvest, not to heat or a longer ripening [13].

There is also a difference in how the crop is grown. Much of Europe sows winter wheat in the autumn. It overwinters as a seedling, needs a cold spell to flower, and is harvested in early to mid summer, spending roughly nine to eleven months in the field [14][15]. That long, fall-sown season brings higher yield, better use of soil moisture, and an earlier, drier harvest. The Canadian prairies mostly cannot follow this model, because the winters are cold enough and the snow cover unreliable enough that a fall-sown crop risks winterkill [15]. So the prairies run largely on hard, high-protein spring wheat, sown in spring and harvested in late summer [14].

The result is two different grains and two different traditions. Europe leans on softer, lower-protein winter wheat and ferments it slowly. Canada grows harder, higher-protein spring wheat. Neither makes bread inherently harder to digest. The levers that actually decide how a loaf sits with you are the same two as before, namely the enzymes standardized into the flour and the fermentation the baker gives it.

So why did the bread feel better in Europe?

Probably several things at once, and none of them are “your wheat is poisoned” [10]:

• Fermentation. Much European bread, especially traditional sourdough, is fermented long and slow, which lowers fructans and boosts digestibility. This is likely the single biggest factor [5][6].
• Enzymes and standardization do the same job on a faster timeline in well-made commercial bread [7].
• Portion and pace. On vacation you eat smaller amounts, more slowly, alongside more vegetables, oil, and walking. That changes digestion too.
• The nocebo effect. Expecting to react can produce real symptoms. Relaxed and abroad, that expectation lifts [10].The takeaway

The instinct to fear “additives” in bread has it backwards. The added enzymes in commercial flour help produce a loaf your gut handles more easily, and mandatory fortification protects the whole population from deficiencies that used to be common. Meanwhile the romantic “nothing added” flour is only as digestible as the fermentation behind it, and it comes with no nutritional safety net.

If bread bothers you, the fix probably is not hunting for flour with a shorter ingredient list. It is choosing bread that has been properly fermented, and appreciating that a little malt, a few enzymes, and five added nutrients are doing quiet, useful work on your behalf.

References

1. Ardent Mills LLC. Kyrol High-Gluten Flour, product specification sheet (ingredient statement). https://innnes.is/media/zs1k3p4x/355043_ardent-m-kyrol-high-gluten-hveiti-227-kg_50452_355043.pdf
2. Canadian Food Inspection Agency. Labelling and composition requirements for grain and bakery products (enrichment of flour; prohibition on the sale of unenriched white flour). https://inspection.canada.ca/en/food-labels/labelling/industry/grain-and-bakery-products
3. Government of Canada. Food and Drug Regulations (C.R.C., c. 870), Division 13, section B.13.001 (required nutrients and prescribed levels for enriched flour). https://laws-lois.justice.gc.ca/eng/regulations/C.R.C.,_c._870/section-B.13.001.html
4. De Wals P, Tairou F, Van Allen MI, et al. Reduction in neural-tube defects after folic acid fortification in Canada. New England Journal of Medicine. 2007;357(2):135 to 142. https://www.nejm.org/doi/full/10.1056/NEJMoa067103
5. Impact of sourdough fermentation on FODMAPs and amylase-trypsin inhibitor levels in wheat dough. Journal of Cereal Science. 2022. https://www.sciencedirect.com/science/article/abs/pii/S0733521022001631
6. Reduction of FODMAPs and amylase-trypsin inhibitors in wheat: a review. 2023. https://www.sciencedirect.com/science/article/pii/S2667025923000031
7. Effects of combined alpha-amylase and endo-xylanase treatments on the properties of fresh and frozen doughs and final breads. Foods. 2020. https://pmc.ncbi.nlm.nih.gov/articles/PMC7362195/
8. Interactions between wheat characteristics and feed enzyme supplementation in broiler diets. Animal Feed Science and Technology. 2014. https://www.sciencedirect.com/science/article/pii/S0377840114002958
9. Exogenous xylanase improves broiler production efficiency by increasing proximal small intestine digestion of crude protein and starch in wheat-based diets of various viscosities. Animal Feed Science and Technology. 2020. https://www.sciencedirect.com/science/article/abs/pii/S037784012030643X
10. Separating the empirical wheat from the pseudoscientific chaff: a critical review of the literature surrounding glyphosate, dysbiosis and wheat-sensitivity. Frontiers in Microbiology. 2020;11:556729. https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2020.556729/full
11. Exploring bread quality through the use of commercial bacterial and fungal xylanases: effects on dough rheology, loaf volume, and arabinoxylan structure. Journal of Food Science. 2026. https://ift.onlinelibrary.wiley.com/doi/10.1111/1750-3841.70940
12. Cereals Canada. Falling Number is an Important Indicator of Wheat Quality (falling number, alpha-amylase, and sound grain). https://cerealscanada.ca/falling-number-is-an-important-indicator-of-wheat-quality/
13. Mares DJ, Mrva K. Late-maturity alpha-amylase: low falling number in wheat in the absence of preharvest sprouting (climate and temperature effects on endogenous alpha-amylase). Journal of Cereal Science. 2008;47(1):6 to 17. https://www.sciencedirect.com/science/article/abs/pii/S0733521007000276
14. Cereals Canada. Canadian Wheat (wheat classes and the predominance of spring wheat). https://cerealscanada.ca/canadian-wheat/
15. Winter wheat production in western Canada: opportunities and obstacles (winterkill risk and why spring wheat predominates on the prairies). University of Saskatchewan. https://harvest.usask.ca/items/d6a7c225-43bc-4b9f-a574-b7282a52ad78

If there is one question we hear more than any other at the bakery, it is this: ‘Is your bread better for my blood sugar?’. It is a fair question, and as a scientist I would rather answer it honestly than sell you a slogan. So let’s see what the research actually shows, where it is solid, where it is still debated, and what our own customers keep telling us.

Why sourdough should be gentler

When you eat ordinary bread, enzymes in your gut break its starch down into glucose quickly, and your blood sugar rises in a sharp spike. Sourdough changes that chemistry in a few measurable ways.

During the long fermentation, lactic acid bacteria produce organic acids — mainly lactic and acetic acid. Those acids slow the rate at which your body breaks down starch into glucose, and they in turn lower the pH in the small intestine. This lower pH dampens the activity of the enzyme α-amylase responsible for digesting starch. Fermentation also increases resistant starch, a slow-digesting fraction that behaves more like fibre than sugar. In a 2021 study in the journal Foods, researchers baked eight sourdough breads under different conditions and measured starch digestion directly. The best loaf — whole wheat, fermented in warm conditions with selected strains — showed nearly a 30% lower estimated glycemic index than ordinary bread, with resistant starch reaching around 16 grams per 100 grams.

In plain terms: the acid in real sourdough acts as a natural brake on the blood-sugar spike. Energy is released more gradually.

The honest part

Here is where I will be straight with you, because you deserve it. A lot of that evidence comes from laboratory and test-tube measurements. When researchers look specifically at human trials, the picture is more mixed. A careful 2023 review in Frontiers in Nutrition found that the clinical data on sourdough and glycemic index are inconsistent — some studies show a benefit, some show none — and concluded the effect is not yet firmly proven in people. Other factors, like the type of grain, how coarse the flour is, and how much fibre the loaf contains, can matter as much as the fermentation itself.

So I will not tell you our bread lowers anyone’s blood sugar. What I can tell you is that the mechanism is real and well described, and that slowly fermented bread is exactly the kind the mechanism favours.

What our customers keep telling us

This is where the story gets personal. Many of you have told us that your blood sugar does not spike after eating our Extended Fermentation Sourdough the way it does after ordinary bread. A number of you have gone further and tracked your HbA1c — the measure of how well blood sugar has been managed over the previous two to three months — and seen it drop after switching to our bread.

Those are not controlled clinical trials, and I would never dress them up as one. But they are real experiences, from real people, and they line up beautifully with what the science predicts should happen. When the mechanism and the lived experience point the same way, that is worth paying attention to.

If you are managing your blood sugar, this is not medical advice, and your own doctor knows your numbers better than a loaf of bread does. But if you would like to try the difference for yourself, our Extended Fermentation Sourdough is the one to start with — no added sugar, high in acid, and made the slow way for exactly this reason.

Sources: Demirkesen-Bicak et al. (2021), Foods, 10(3), 514. D’Amico et al. (2023), Frontiers in Nutrition, 10, 1230043. Arora et al. (2021), Trends in Food Science & Technology, 108, 71–83.

There is a special kind of chemistry happening in our bakery every single day. Day and night, a living culture of bacteria and yeast, that we lovingly call Ralph, is at work in our bakery — fermenting, acidifying, transforming. We tend to think of bread as a simple food, and in many ways it is. But sourdough, the oldest leavened bread humans have ever made, is also one of the most biologically sophisticated. And the more researchers study it, the more remarkable it turns out to be.

As a scientist, I find this genuinely exciting. So rather than just tell you that our bread is "good for you," I would like to show you why — drawing on what the research actually says. Let us open the loaf and look inside.

What sourdough really is

Sourdough is flour and water left to ferment spontaneously by lactic acid bacteria (LAB) and wild yeasts. No commercial baker’s yeast. No chemical leavening. Just a community of microbes that, given time, do two jobs at once: they produce gas that makes the dough rise, and they produce acids that give sourdough its characteristic tang and flavour — and, as we will see, much of its nutritional value.

This is not a fringe health trend. A 2021 systematic review in Trends in Food Science & Technology gathered roughly thirty years of research — over 1,200 peer-reviewed studies — to take stock of what we know. Their conclusion was unambiguous: because of its unique microbial composition, sourdough offers "undoubted advantages" over any other leavening agent, not only in flavour and texture, but in nutrition. Bread made this way has been documented in nearly fifty countries across every continent. It is part of the intangible cultural heritage of humanity.

Gentler on your blood sugar

If there is one finding that comes up again and again, it is this: sourdough fermentation lowers the glycemic index (GI) of bread — the measure of how quickly a food raises your blood sugar.

This is not a vague claim. In a 2021 study published in Foods, researchers baked eight different sourdough breads under varying conditions and measured their effect on starch digestion directly. The result: sourdough bread had a significantly lower estimated glycemic index than ordinary bread. The most striking case — a whole-wheat loaf fermented at 30°C with selected bacterial strains — showed a nearly 30% reduction in glycemic index. At the same time, fermentation increased resistant starch, the slow-digesting fraction that behaves more like fibre than sugar, reaching around 16 grams per 100 grams in the best loaves.

The mechanism is elegant. The organic acids produced during fermentation — chiefly lactic and acetic acid — slow the rate at which your body breaks starch down into glucose. Acetic and propionic acids lower the pH in the small intestine, which in turn dampens the activity of the digestive enzymes (such as α-amylase) that liberate sugar. In plain terms: the acid in real sourdough acts as a natural brake on the blood-sugar spike. Energy is released more gradually and steadily.

This is exactly why our Extended Fermentation Sourdough Bread has become such a popular loaf. Thanks to its low sugar and high acid content, many of you have told us your blood sugar no longer spikes after eating it. Some of you have even tracked your HbA1c — a measure of how well blood sugar has been managed over the previous two to three months — and seen a significant drop after switching to our bread.

Unlocking the nutrients already in the grain

Whole grains are rich in minerals — magnesium, zinc, iron, phosphate, potassium. The catch is that much of this is bound up by a compound called phytic acid, found in the bran. Phytic acid clings to minerals so tightly that they pass through the digestive tract largely unabsorbed. Nutritionists call compounds like this anti-nutritional factors, and they are one of the quiet limitations of ordinary bread.

Here sourdough has a beautiful answer. The bacteria in the culture, along with enzymes in the flour, produce phytase — an enzyme that breaks phytic acid apart and releases those trapped minerals. A 2024 review in Foods examining the mechanisms behind sourdough’s nutrition described exactly this: fermentation makes the minerals in grain substantially more bioavailable, meaning your body can actually absorb and use them.

Protein follows the same pattern. The same review reported that sourdough fermentation improved protein digestibility by around 16% and protein bioavailability by nearly 19% compared with conventional yeast bread. The lactic acid bacteria begin breaking proteins down into more digestible forms, and in the process generate compounds like GABA (gamma-aminobutyric acid), associated with lowered blood pressure and a calming effect. The bread, in other words, is partly pre-digested by its own microbes before it ever reaches your plate.

Anyone in the mood for our Malted Harvest Sourdough?

Kinder to sensitive stomachs

Many people who feel unwell after eating bread do not have celiac disease at all. Their discomfort — bloating, cramping, gas — is often a reaction to a group of fermentable carbohydrates known as FODMAPs, which can trouble those with irritable bowel syndrome or non-celiac gluten sensitivity.

Because sourdough’s microbes consume sugars during the long fermentation, they reduce substantially the FODMAP content of the finished bread. This is one of the reasons that people who "cannot eat bread" often find they tolerate genuine, slowly fermented sourdough comfortably. It is also worth noting that the 2021 systematic review documented experimental work in which selected cultures combined with specific enzymes reduced residual gluten to below 10 parts per million — with three clinical trials supporting the safety of such fully hydrolyzed products for celiac patients. While these tests were performed under medical supervision, we want to be clear: our everyday loaves are not gluten-free; the science illustrates just how profoundly fermentation can transform the grain.

More than the sum of its ingredients

What I find most compelling is that the the sourdough fermentation process does not just preserve the nutrition of the ingredients — it adds to them. During fermentation, the bacteria synthesize B vitamins, including folate (B9), riboflavin (B2), and even B12. They increase the availability of antioxidant phenolic compounds naturally present in the grain. The fibres that survive — β-glucans, fructans, resistant starch — act as prebiotics, feeding the beneficial bacteria in your gut, whose byproducts are linked to lower cholesterol, lower triglycerides, and improved insulin sensitivity.

There is even a flavour dividend with a health benefit attached: because fermentation develops such depth of taste, well-made sourdough can carry less added salt without tasting flat — a small but meaningful advantage given how much excess sodium burdens the modern diet.

Why we do it the slow way

All of this takes time, and time is precisely the point. The acids, the enzymes, the vitamins, the gentler glycemic response — none of it can be rushed or replicated with a packet of yeast and a quick rise. Every benefit described here is a direct consequence of letting a living culture work at its own pace.

So when you slice into one of our loaves, you are not just getting bread. You are getting the product of a fermentation that ancient bakers practiced by instinct and modern science now understands in more detail: a food that releases its energy slowly, surrenders its minerals generously, sits more easily in the gut, and gives back more than it takes.

That is what we are all about. Real bread, made the slow way, because the science — and the centuries — agree it is worth it.

References

Arora, K., Ameur, H., Polo, A., Di Cagno, R., Rizzello, C. G., & Gobbetti, M. (2021). Thirty years of knowledge on sourdough fermentation: A systematic review. Trends in Food Science & Technology, 108, 71–83. https://doi.org/10.1016/j.tifs.2020.12.008

Demirkesen-Bicak, H., Arici, M., Yaman, M., Karasu, S., & Sagdic, O. (2021). Effect of different fermentation condition on estimated glycemic index, in vitro starch digestibility, and textural and sensory properties of sourdough bread. Foods, 10(3), 514. https://doi.org/10.3390/foods10030514

Alkay, Z., Falah, F., Cankurt, H., & Dertli, E. (2024). Exploring the nutritional impact of sourdough fermentation: Its mechanisms and functional potential. Foods, 13(11), 1732. https://doi.org/10.3390/foods13111732