Fructans, Not Gluten, Often Cause Bread Bloating; Long-Fermented Sourdough Helps

Many bakers and bread eaters who blame gluten for post-loaf bloating may be looking at the wrong culprit. Florida gastroenterologist Dr. Joseph Salhab has been urging people with bread-related discomfort to consider fructans - fermentable carbohydrates in wheat and related grains - rather than gluten when celiac disease is not present. He recommends long-fermented sourdough and sprouted-grain breads as gentler options because fermentation and sprouting reduce fermentable carbohydrates and make loaves easier on the gut.

Dr. Salhab posted this guidance on social media on January 22, 2026, noting practical swaps and portion advice for people testing their own tolerance. Fermentation with a live starter breaks down fructans during bulk fermentation and retard, so extended timelines - longer autolyse, longer bulk, cold retard - help reduce the fermentable load in the final crumb. Sprouted-grain flours further lower fermentable carbs because sprouting converts starches into simpler sugars that are then consumed by enzymes and yeast during proofing.

Portion control matters. Monash University low-FODMAP guidelines classify a single plain English muffin as often low-FODMAP, so a modest portion of a low-fructan bread can be tolerated by some people. For those experimenting at home, this means sampling small amounts of different breads rather than switching to restrictive diets immediately.

Bakers can apply these insights directly at the bench. Shift toward longer fermentation schedules - levain builds and overnight cold proofs - to let wild yeast and lactobacilli work on fructans. Use sprouted-wheat or sprouted-spelt flours in part or in whole to lower fermentable carbohydrates. Freeze-slice-and-reheat routines are also useful: freezing and reheating bread increases resistant starch, which in some people is easier to digest than rapidly fermentable starches. That technique also fits into routine kitchen workflows for bakers selling loaves or for households that bake in batches.

This guidance is aimed at people without celiac disease; those with celiac must continue strict gluten avoidance and follow medical advice. For community bakers running classes, markets, or blogs, the takeaway is practical: label fermentation time and sprouted ingredients on loaves, offer smaller portion options like English-muffin-style products, and consider noting freeze-thaw instructions for customers who struggle with digestibility.

For sourdough hobbyists and pros, the conversation reframes a familiar problem: crumb clarity can mean digestive clarity. Expect more home experiments and recipe swaps in community forums as bakers test longer ferments, higher levels of sprouted flour, and freezing-reheating routines to craft loaves that taste great and sit easier with their neighbors.