Rye Sourdough Bread
Tested serving
- 2 slices (50g)
Rye sourdough bread is High FODMAP at 2 slices (50g), from its Fructans and GOS.
- At 2 slices (50g), rye sourdough is high.
- Fructans from the rye grain lead, with GOS adding to the load, and the sourdough process does not bring this bread down to low.
For toast or a sandwich base, a certified gluten-free bread is an easier pick.
Why rye sourdough bread is rated high
Rye sourdough bread is high FODMAP at 2 slices (50g), and fructans and GOS are the reason. Rye is a grain that carries a lot of both, and although a long, traditional sourdough fermentation works on the dough, this loaf is still high at an ordinary sandwich amount. Fermentation starts from what the grain brought, and with rye that is a lot. There is no low serve of rye sourdough to fall back on.
What changes your risk
- Serving size 2 slices (50g) is high, and there is no low amount of rye sourdough to point to.
- Fermentation has a limit a long, traditional fermentation lets the starter work on the dough, but with rye the loaf is still high at 2 slices (50g), so the sourdough name does not turn it into a low choice.
- Sourdough flavoured is not sourdough a fast supermarket loaf that gets its tang from added acid or a short prove has not had the fermentation that does the work. Bakery fermentation time is the thing that counts, not the word on the label.
- Toasting and freezing change nothing heat does not destroy fructans or GOS, and neither does freezing or cooling a loaf. A frozen slice carries what the fresh slice carried.
- Stacking across the day bread is the easiest food to stack. Toast in the morning, a sandwich at lunch and a roll with dinner line up fructans and GOS repeatedly, alongside pasta, crackers, onion and garlic from the rest of the plate.
Swaps
For sandwiches and toast, gluten free bread is the dependable everyday option, and rice cakes or corn thins cover an open sandwich. Check gluten free loaves for inulin, chicory root fibre and honey, which turn up in some of them. Ordinary rye bread, pumpernickel, wheat bread and wheat crackers are not swaps, since they carry the same fructans, and another sourdough loaf is not automatically a low FODMAP option either.
How to lower the load
Read the flour list on any loaf. Rye is the part to watch even when the loaf is genuinely fermented, because this one is still high at 2 slices (50g). For sandwiches, gluten free bread holds up better toasted, and keeping the loaf sliced in the freezer means you take out what you need instead of working through a fresh loaf before it stales. Fillings are worth a look too, since deli meats, dressings and stock-based spreads often bring onion and garlic to the sandwich.
Common questions
is rye sourdough bread low fodmap
No. It is high FODMAP at 2 slices (50g), driven by the fructans and GOS in the rye.
how much rye sourdough bread can i eat on a low fodmap diet
2 slices (50g) is high, and there is no low serve of rye sourdough, so it is a bread to swap rather than portion.
doesn't sourdough fermentation make bread low fodmap
Not on its own. A long, traditional fermentation works on the dough, but with rye it is not enough, and this loaf is still high at 2 slices (50g).
what bread can i have instead of rye sourdough
Gluten free bread is the dependable swap for sandwiches and toast, and rice cakes or corn thins work for an open sandwich. Check gluten free loaves for inulin, chicory root fibre and honey.
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Where this rating comes from
Rye Sourdough Bread is rated from published lab measurements of its FODMAP content, using the low, moderate and high cutoffs of Varney et al. (2017).
Feedback sent through the FODMAP Foods app has led to changes in this list.
Sources
- Fructan and free fructose content of common Australian vegetables and fruit. Muir et al. (2007), J. Agricultural and Food Chemistry 55(16):6619-6627.
- Measurement of short-chain carbohydrates in common Australian vegetables and fruits by high-performance liquid chromatography (HPLC). Muir et al. (2009), J. Agricultural and Food Chemistry 57(2):554-565.
- Quantification of fructans, galacto-oligosaccharides and other short-chain carbohydrates in processed grains and cereals. Biesiekierski et al. (2011), J. Human Nutrition and Dietetics 24(2):154-176.
- Dietary sorbitol and mannitol: food content and distinct absorption patterns between healthy individuals and patients with irritable bowel syndrome. Yao et al. (2014), J. Human Nutrition and Dietetics 27(Suppl 2):263-275.
- FODMAPs: food composition, defining cutoff values and international application. Varney et al. (2017), J. Gastroenterology and Hepatology 32(Suppl 1):53-61. Supplies the low, moderate and high cutoffs used on this page.
Informational only, not medical advice. Individual tolerance varies. Talk to a healthcare professional or a dietitian for personal guidance.