The Hidden-Gluten Watchlist: Every Ingredient Name That Should Make You Look Twice

Gluten rarely walks onto a label under its own name. It arrives as “malt extract” in your breakfast cereal, as “brewer’s yeast” in a snack seasoning, as an unnamed “starch” in a sauce packet. If you’re newly diagnosed — or cooking for someone who is — the ingredient list is where the real work happens, and this page is the map.

Three layers, colour-coded the same way on the printable: names that ARE gluten, names that often carry it, and the tricksters — terms that sound alarming or harmless and are regulated differently depending on where you’re shopping. Print it, stick it inside a kitchen cupboard, and the label aisle gets a lot less hostile.

One honest note before the list: this is label-reading knowledge, not medical guidance — and rules differ by region, so we’ve split them out below rather than blending them into one comfortable-sounding answer.

Layer 1 — The fifteen forbidden names

German-speaking coeliacs learn a canonical list of fifteen forbidden ingredient names by heart — popularised by the Zöliakie Austausch community, whose printable Merkzettel deserves the credit for making it a household standard: taught in the biggest communities, printed on wallet cards, pinned to fridge doors. It’s the right backbone for every language, so here it is with the EN/DE/IT label names side by side, checked against EU and US labelling law (same order on the printable):

Their everyday aliases count too: durum, semolina, farina, couscous, freekeh, pearl barley/Graupen, malt flavouring, malted anything — different costume, same grains.

And one habit that catches what skimming misses: these names count wherever they appear — including inside brackets, round or square, after “flavourings” or “spices”. Gewürze (Weizen) is a wheat product. Read to the closing bracket, every time.

Wheat starch (#2) carries the one asterisk on the list: specially processed gluten-free wheat starch (labelled “gluten-free” / “glutenfrei”, the Codex wheat starch) is permitted in certified GF products in Europe (EU Reg. 828/2014 + Codex Standard 118-1979 — verified 27.08.2026). Wheat starch WITHOUT that gluten-free label stays firmly forbidden. This distinction confuses more newly-diagnosed shoppers than any other line here.

Oats (#5) carry the other one: ordinary oats sit on the forbidden list because field and mill contamination is the rule, not the exception. Certified gluten-free oats are the regulated exception (Coeliac UK oats position — verified 27.08.2026: oats contain avenin, not gluten; most coeliacs tolerate avenin; contamination is why the rule exists) — and some coeliacs react to oat avenin itself, so if oats are new to you post-diagnosis, that’s a dietitian conversation, not a label question.

Layer 2 — Names that often CARRY gluten

These aren’t gluten by definition, but gluten is their usual travelling companion. Treat every one as “read the whole label, then decide”.

• Malt in disguise — barley malt itself sits in the forbidden fifteen; this layer is for its quieter costumes: malt vinegar, malted milk, “malt flavouring” buried mid-list in cereals and snacks. (And barley is the quiet one on US labels: see the trap in Layer 3.)
• Brewer’s yeast — frequently a beer-brewing by-product grown on barley. Here the region matters: on an EU label, an ingredient derived from a gluten cereal must name that cereal (1169/2011 Annex II “and products thereof” with only exemptions (a)–(d), none covering yeast — verified 27.08.2026) — so EU brewer’s yeast with no barley named declares itself clean. On a US label, barley never has to be declared, so brewer’s yeast needs provenance. Nutritional yeast is usually grown on sugar media and fine either way.
• Soy sauce — traditional brewing uses roughly as much wheat as soy. Tamari is typically brewed without wheat, but “typically” is not a certificate: read the bottle.
• “Starch”, “modified food starch”, “vegetable starch” — when the plant isn’t named. In the EU, an ingredient from a gluten cereal must name the cereal (EU Reg. 1169/2011 Annex II — verified verbatim 27.08.2026), so an unnamed starch in an EU-labelled product points away from gluten grains. On a US label, “starch” alone means corn by convention, and wheat must be declared under allergen law — but imports and supplements play by looser rules. The tri-state verdict on unnamed starch therefore splits by region — see box 3 below.
• Breadcrumb aliases — panko, rusk (common in sausages), gratin toppings, “crispy coating”.
• Noodle near-misses — soba (buckwheat noodles are often 20–80% wheat), udon (wheat by definition), couscous and orzo (pasta, not grains of their own).
• Seasoning blends, bouillon, spice mixes — flour and malt turn up as carriers and anti-caking helpers. On EU labels they’d have to be named (read the list, not the front); on US labels malt can sit there silently — which is where certified blends earn their keep.
• Communion wafers — traditional hosts are wheat; low-gluten and GF alternatives exist and parishes generally know about them.
• Liquorice — wheat flour is a standard binder in the classic sweet.
• Wheat grass and barley grass — sold as health powders; the grass itself, cut before the grain forms, is technically gluten-free, but field and processing contamination make certification the only sensible standard here.
• Not food, still yours to check: play-dough (wheat by default), some paints and glues in classrooms, and some medications and supplements that use starch binders. For medication, the pharmacist is the right label-reader — and the answer differs by country and product.

Layer 3 — The tricksters (where the region on the label changes the answer)

This is the layer most lists skip, and it’s where a blended answer would genuinely mislead you. Read the column for where you shop.

On EU labels — the green flags first

If the scary word “wheat” in those names has ever made you put a product back on the shelf: on EU labels, these four were fine all along. And the word “glutenfrei”/”gluten-free” is law-bound — under 20 ppm, EU-wide (EU Reg. 828/2014: ≤20 mg/kg — verified verbatim 27.08.2026) — the strongest sentence on any label.

On US labels

(21 CFR 101.91 — verified on eCFR 27.08.2026: <20 ppm; gluten grains = Triticum, Secale, Hordeum + hybrids. FALCPA 2004: wheat among the declared major allergens, barley/rye not.)

• “Gluten-free” is regulated (<20 ppm, and no gluten grain ingredient unless processed to remove gluten) — also trustworthy as a claim.
• The barley gap is the big US trap: allergen law (FALCPA) forces “wheat” to be declared — but not barley or rye. Malt can sit in a US ingredient list with no allergen warning at all. On US labels, you hunt malt yourself.
• “May contain” statements are voluntary. Their absence tells you nothing about shared lines — a fact even long-diagnosed coeliacs are often surprised by.
• Modified food starch: if it were wheat, US law requires the word “wheat” — so unnamed starch on a US-made product is generally corn. Imports without US-style declarations are the exception to watch.

Everywhere: the certification marks — the crossed-grain symbol (AOECS licence in Europe), national coeliac-society certifications, GFCO — outrank every rule of thumb on this page. When a product carries one, the detective work has been done for you, with audits behind it.

The tri-state habit (borrow this)

For every ingredient you meet, file it in one of three boxes — the same coding the printable uses:

1. Naturally gluten-free — rice, corn, potatoes, legumes, plain meat, fish, eggs, fruit, veg, plain dairy. (Whole grains and pulses still deserve a rinse-and-sort: they share harvests and trucks with wheat.)
2. Read the label — anything processed, sauced, seasoned or shaped: the Layer 2 world.
3. Needs certified — and here the region changes the size of the box, because EU declaration law covers ingredients, not cross-contamination:
   • On EU labels, this box is small. Any gluten cereal used as an ingredient — in a starch, a yeast, a seasoning blend — must be named on the label (EU Reg. 1169/2011 Annex II — verified 27.08.2026), so an EU label with no gluten cereal named is formulation-clean without any certificate. What remains for certification is the contamination question: oats (that’s the whole reason they’re on the fifteen), wheat-grass and barley-grass powders (the grass is cut before the grain, the risk is the field and the mill), and — for the highly sensitive — anything milled or blended alongside flour. “May contain” is voluntary in the EU too; certification is what replaces that silence with an audited <20 ppm answer.
   • On US labels, this box is bigger. Barley and rye never have to be declared, so malt can hide in a seasoning with no warning — uncertified blends, unnamed starches on imports, and everything in the EU list above belong here.

Take it with you

• Every flour and grain on this list has its own entry in our Flour Library — what it is, how it behaves, what to bake with it.
• Eating out instead of label-reading? Our translation cards put this list’s logic into 60+ languages, and the Atlas shows where other coeliacs have already done the scouting.

Sources: EU Regulation 1169/2011 (Annex II), Commission Regulation 828/2014, FDA 21 CFR 101.91, FALCPA (2004), Codex Standard 118-1979, AOECS licensing rules — all verified 27.08.2026 (Annex II + 828/2014 verbatim on EUR-Lex, 101.91 on eCFR, Coeliac UK oats page). The fifteen-name canon: Zöliakie Austausch, “Merkzettel für glutenfreies Einkaufen” — cross-checked against EU Reg. 1169/2011.