Pumpernickel Bread

TLDRLast updated 3 October 2026

Pumpernickel bread is low FODMAP at 18 g, approximately one-third of a slice. Fructans are moderate at 21 g and high at 100 g, listed as two slices.

Serving sizes for pumpernickel bread

The listed portions are 18 g (⅓ slice), 21 g (½ slice) and 100 g (two slices). Household measures are approximate.

Avoid
2 slicesabout 100 g

Tested serving sizes

Tested serving sizes for Pumpernickel Bread and their Gut Friendly rating
ServingAmountMain FODMAPRating
2 slices100 gFructans 0.48 gAvoid
1/3 slice18 gFructans 0.09 gLow
1/2 slice21 gFructans 0.1 gModerate

Breakdown for 2 slices

0gFructose
0gLactose
0.5gFructans
0gGOS
0gSorbitol
0gMannitol
2 slicesabout 100 g

Is pumpernickel bread low FODMAP?

All six listed groups are low at the small 18 g reference. Fructans alone rise at the two larger amounts, while the other five groups remain low. Because the low and moderate references are close in weight, a visual estimate of a piece of dense bread can be misleading. Use the actual grams when comparing portions.

Pumpernickel Bread and IBS: what to know

For pumpernickel and IBS, the central distinction is a small measured piece versus a full bread-based meal. The two-slice high rating does not describe every possible amount. Likewise, the low small portion cannot be extended to a full sandwich. Note the serving and accompaniments when exploring your own tolerance.

Gut-friendly ways to eat pumpernickel bread

Cut a weighed piece into small squares for an appetiser, or serve it as a side rather than building a large sandwich around it. Weigh before adding spreads, so you can distinguish bread from toppings. For a different rye preparation, consult light rye sourdough bread rather than transferring the pumpernickel limit.

Frequently asked questions

How much pumpernickel is low FODMAP?

The catalogue's low reference is 18 g. That is described as about one-third of a slice, which is smaller than a typical sandwich portion.

Is half a slice low?

The listed half-slice reference weighs 21 g and is moderate for fructans. Weighing avoids treating a rough slice fraction as a precise serving.

What makes two slices high FODMAP?

Fructans are high at the 100 g reference. Fructose, lactose, mannitol, sorbitol and GOS remain low at that amount.

Can I apply this guide to all dark rye breads?

Pumpernickel is a separate bread entry. Other rye loaves and crispbreads need their own preparation-specific serving guidance.

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Sources and editorial notes

Published and maintained by Gut Friendly. This guide has not been independently reviewed by a dietitian. Serving information comes from our food catalogue. Where references are listed, they explain the research and preparation differences. Check the original source for current portions.

Gut Friendly provides general information, not medical advice.