Wholegrain Wheat Bread (US)

TLDRLast updated 3 October 2026

US wholegrain wheat bread is low FODMAP at 32 g, approximately three-quarters of a slice. Fructose is moderate at 43 g. At 82 g, around two slices, fructose and fructans are high.

Serving sizes for wholegrain wheat bread (us)

Reference portions: 32 g (¾ slice), 43 g (one slice), and 82 g (two slices). Slice descriptions are approximate rather than universal sizes.

Avoid
2 slicesabout 82 g

Tested serving sizes

Tested serving sizes for Wholegrain Wheat Bread (US) and their Gut Friendly rating
ServingAmountMain FODMAPRating
2 slices82 gFructans 0.3 gAvoid
3/4 slice32 gFructans 0.04 gLow
1 slice43 gFructans 0.05 gModerate

Breakdown for 2 slices

0.2gFructose
0gLactose
0.3gFructans
0gGOS
0gSorbitol
0gMannitol
2 slicesabout 82 g

Is wholegrain wheat bread (us) low FODMAP?

The small 32 g reference has all six groups in the low range. The one-slice 43 g amount changes fructose only, while the larger two-slice amount also brings fructans into the high range. This pattern differs from the wholegrain wheat entry without a country marker, so the two guides should remain separate.

Wholegrain Wheat Bread (US) and IBS: what to know

For wholegrain bread and IBS, the amount on the plate is more informative than the grain label alone. A weighed part-slice and a conventional sandwich are different portions here. When comparing bread choices, record the exact loaf, total bread weight and toppings so a product change can be understood.

Gut-friendly ways to eat wholegrain wheat bread (us)

Cut the measured piece into toast fingers, or use it as the base of a small open sandwich. Weigh any extra crust or end piece you add to the plate. If preparing breadcrumbs for a recipe, keep a record of the bread used before mixing it into the other ingredients.

Frequently asked questions

Is one slice of US wholegrain bread low?

The one-slice reference is 43 g and moderate for fructose. The low reference is 32 g for this particular entry.

Which groups make two slices high FODMAP?

Fructose and fructans are high at 82 g. The other four listed groups remain low at that amount.

Are fructans already moderate at 43 g?

No. Fructans remain low at the 43 g reference; fructose is the group responsible for its moderate overall rating.

Can I use these portions for a loaf from another country?

Country-specific catalogue entries can differ. Use the guide that matches the loaf rather than transferring the US serving by name alone.

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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.