These fake sourdough breads typically contain yeast and/or a sweetener. This is an easy giveaway clue that the bread is a phony and should be avoided if one seeks a traditionally baked loaf.
True sourdough bread does not contain bakers yeast and instead utilizes a lactobacilli based starter culture. True sourdough bread is also baked at a lower temperature for a longer period of time which protects the integrity of the cereal grains and preserves the nutritional value. Not only is the nutritional value maintained, but anti-nutrients such as phytic acid are eliminated and gluten, that very difficult to digest plant protein, is broken down.
When baker’s yeast was first introduced as an alternative to sourdough starters in 1668 in France, it was strongly rejected because scientists at the time already knew that it would negatively impact people’s health.Â
While yeast is used almost universally for baking breads anymore, the skyrocketing cases of gluten intolerance and celiac disease are causing many to look backwards at how nonindustrialized peoples consumed gluten containing breads with no digestive difficulty.
One study that examined how celiacs tolerate true sourdough bread was conducted in Europe. 17 people suffering from celiac disease were given 2 grams of gluten containing bread risen with either baker’s yeast or a normal lactobacilli culture.  13 of the 17 showed negative changes in intestinal permeability consistent with celiac disease. 4 people did not show any negative changes.
Then, the 17 study participants were given true sourdough bread risen with a special lactobacilli culture able to hydrolyze the 33-mer peptide which is the primary amino acid building block that causes an immune response in people with celiac disease. None showed any negative changes in their intestinal permeability after consuming the bread which was made up of 30% wheat flour and a mix of oat, millet, and buckwheat flour.
The researchers’ conclusions were summarized as follows:
These results showed that a bread biotechnology that uses selected lactobacilli, nontoxic flours, and a long fermentation time is a novel tool for decreasing the level of gluten intolerance in humans.
What I find interesting about the study is that even when the people who consumed the gluten containing bread risen with either baker’s yeast or a normal lactobacilli culture, 4 did not show any negative changes to their baseline values of intestinal permeability.  Did these 4 consume bread raised with a normal lactobacilli culture? If so, perhaps even a normal sourdough culture would be sufficient for many celiacs to consume.
Certainly, most with simple gluten intolerance would find true sourdough bread to be easily consumed with no digestive distress.
Clearly, more study on this needs to be done, but the results are incredibly promising.
It seems that the noblemen in the court of Louis XIV of France back in 1668 had it right all along. Abandoning the traditional methods of bread preparation in favor of baker’s yeast would have disastrous effects on people’s health. Little did they know that their wisdom several centuries later would be termed “novel” by scientists in the biotechnology industry!
Sarah, The Healthy  Home Economist
Sources and More Information
Study Finds Wheat-based Sourdough Bread Tolerated by Celiac Patients
Einkorn Sourdough Crackers with Nut Butter
No-Knead Einkorn Sourdough Bread
The Good Gluten You Can Probably Eat Just Fine
The Real Reason Wheat is Toxic (It’s Not the Gluten)
This is a very interesting article because I follow the Know the Cause (Doug Kaufmann, The Fungus Link) diet to eliminate fungus and yeast as the cause of inflammation/disease in the body. The first phase eliminates ALL grain, but eventually you can have true sourdough bread. I’d always wondered why that type specifically was recommended and how to know if it was “true” sourdough or not. This article really clarifies it for me! I’m with all the previous comments that are asking for a recipe for how to make this. If anyone can share this, I’d be most grateful!
Yay! I’m working toward this!
Fascinating to learn that traditional sourdough does not include yeast. It seems the further we get from the traditional food wisdom of our ancestors, the more trouble we get in.
The natural, traditional foods are the best.
Nourishing Traditions has a sourdough recipe in it. But I haven’t tried it yet.
I found out last summer that I am sensitive to gluten AND yeast, so sourdough seems to be a win-win option, I just haven’t had the guts to try it yet. I am planning on ordering a starter, though, and trying it with spelt. Luckily my hubby loves sourdough, so he doesn’t need convincing. Thanks for the post!
I have never been diagnosed but have gluten isseus quite badly. I eat sourdough without issues.
nder if that goes foe Sourdough Pretzels too ??
Tested and didn’t work for me (mental health issues with gluten consumption – not confirmed celiac). I didn’t make it myself though, so perhaps… perhaps. I do better without eating “bread” on a daily basis though, so I’m not too eager to leap into it. One of these days maybe. Options are nice to have…
Yes, we’d love a good, trusted sourdough starter/recipe as well. You’re full of wonderful information Sarah, continual thanks!
I think it’s important to point out that the bread that caused no reaction was made with special culture that I’m assuming isn’t easily available and only contained 30% wheat, which was combined with gluten-free grains. This is great and a very positive finding for those who suffer with celiac or gluten intolerance, but it is NOT a green light to safely start eating gluten-containing sourdough bread. For those with gluten damage, even a small amount causes more damage and for those who have healed, they may not see side affects of damage for a while. I guess while this is exciting news, I’m also cautioning those who have been concerned about possible gluten sensitivities of one form or another (and if you have a compromised gut, gluten is going to be harmful whether you have the genes for celiac or not) to not rush out and start making or buying sourdough without first carefully considering the risks.