Smelt

Low FODMAP

Typical portion

Any typical portion Low

Smelt is Low FODMAP, a plain little fish that's all protein and fat with no fermentable carbohydrate in the mix.

As plain fish, smelt is essentially protein and fat with negligible carbohydrate, so there are no FODMAPs to build up and it stays comfortable at any typical portion.

Enjoy them pan-fried or baked with olive oil, salt, and a squeeze of lemon, and lean on herbs or garlic-infused oil rather than fresh garlic to keep the seasoning easy.

Why smelt is rated low

Smelt is low, and the rating is estimated from what the fish is made of rather than from a tested and weighed portion, which is why the serving data stays qualitative here: the ladder reads "Any typical portion" at low, with no gram figure and nothing above it that turns. These are small fish eaten whole, protein and fat with effectively no fermentable carbohydrate. The catch is how smelt is almost always served. It is a fried fish, and frying means flour or crumb, a seasoning mix and a dipping sauce, so a plate of smelt at a restaurant is usually three ingredients you have not checked sitting on top of one you have.

What changes your risk

The coating Smelt is traditionally dredged in wheat flour or crumbed before frying, and a beer batter adds more wheat again. Swapping to rice flour, cornflour or polenta keeps the crunch without it.
The fry seasoning Commercial fish fry mixes, cajun blends and seafood seasonings lead with onion powder and garlic powder. That is a concentrated dose, not a trace, and it coats every fish on the plate.
The dip Aioli, garlic mayonnaise, tartare sauce with onion in it and creamy dips made with soft cheese carry more FODMAP load than the entire plate of fish. A wedge of lemon does the same job for the flavour.
Frying does not change the fish Heat leaves FODMAPs intact. Hot oil crisps the coating but does nothing to the flour, the seasoning or the sauce, so nothing is neutralised by the pan.
Stacking across the plate Smelt is finger food, usually eaten alongside bread, chips with a seasoned salt, a beer and other shared dishes. Low is per food, and the running total across a shared table is what actually adds up.

What else works

Smelt itself needs no substitute, and other plain fish, plain meat, poultry, eggs and firm tofu sit in the same place. The swaps that matter are around it. Dredge in rice flour, cornflour or polenta instead of wheat flour for the same crisp shell, fry in plain or garlic infused oil, and season with salt, pepper, paprika, lemon and chopped chives or the green tops of spring onions rather than a packet mix. For dipping, lemon juice, a plain vinegar dip, or mayonnaise you have checked for onion and garlic all work. What does not inherit smelt's rating: crumbed or battered smelt made with wheat, tinned smelt in a tomato and onion sauce, garlic aioli, tartare sauce built on onion, and creamy dips made with cream cheese or ordinary yoghurt.

How to keep it low

Buy smelt whole and fresh, or frozen and plain, rather than anything pre coated or pre seasoned, since a pre crumbed pack has already made your decisions for you. They need very little preparation, which is part of the appeal: rinse, pat very dry so the coating sticks, toss in rice flour or cornflour with salt and pepper, and fry hot and fast in plenty of oil. Drain on paper, salt while hot, and put lemon wedges on the table instead of a dip. Cook them the day you buy them and keep them cold until then. Eating out, ask what the fish is floured in and whether the seasoning is a house mix, and ask for lemon instead of the aioli, which is a small change that removes the largest FODMAP source on the plate.

Common questions

is smelt low fodmap

Yes. Smelt is rated low, an estimate based on its composition as plain fish: protein and fat with almost no fermentable carbohydrate. The ladder reads "Any typical portion" at low.

how much smelt can i eat

No gram figure applies to smelt here. The serving data is qualitative and "Any typical portion" comes in low, so a normal plateful of plain fish is fine. The coating, the seasoning and the dip are the parts that change the answer.

is fried smelt still low fodmap

The fish is, but the standard preparation is not automatically. Wheat flour or breadcrumbs and a packet fish seasoning bring wheat, onion powder and garlic powder with them. Rice flour or cornflour with salt and pepper keeps it plain.

what can i dip fried fish in on a low fodmap diet

Lemon is the simplest option, and a plain vinegar dip or a mayonnaise you have checked for onion and garlic also works. Garlic aioli and tartare sauce made with onion are the two to leave alone.

Learn more

Informational only, not medical advice. Individual tolerance varies. Talk to a healthcare professional or a dietitian for personal guidance.

Smelt is an estimated rating: it is inferred from the food's ingredients and composition and cross-checked, not measured directly in the papers below. The low, moderate and high cutoffs are still those of Varney et al. (2017).

References

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 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. 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.