Ingredients · Category-wide, B&G Foods (Wright's), Colgin, McCormick (Stubb's)

Is liquid smoke gluten-free?

Evidence

BNational celiac organisation

Last checked

2026-08-13

Varies by country

No

Source wrightsliquidsmoke.com+5 more

Why

The manufacturing process has no grain in it anywhere. Hardwood is smouldered, the smoke is drawn through water, the water-soluble aromatic compounds dissolve, and the result is filtered and bottled. Wheat, barley and rye never enter the building. Everything else on a liquid smoke label is an optional addition, and those additions are what the question is really about.

Wright's has the shortest panel in the category: "Water, Natural Hickory Smoke Concentrate." Two ingredients. B&G Foods states on the product page that "Wright's® is gluten-free and Non-GMO Project Verified," and puts it more categorically elsewhere on the same site: "Wright's® Liquid Smoke is always gluten free, contains no artificial colors, added sugar, vinegar, or salt." Hickory, mesquite and applewood all carry it.

Colgin adds the three ingredients people worry about, and answers for them directly. Every Colgin flavour is "Water, Authentic [Hickory / Mesquite / Pecan / Applewood] Smoke Flavor, Vinegar, Molasses and Caramel Color." Vinegar of unstated source, molasses, and caramel colour are exactly the trio that makes a careful shopper hesitate. Colgin's FAQ closes it: "Yes, Colgin Authentic Liquid Smoke is gluten free." That is a manufacturer statement addressing gluten, so you don't have to reason about where the vinegar came from.

Stubb's has the longest panel and the only soy-sauce component. McCormick lists it under a "Gluten Free Ingredients" header: "Water, Natural Flavor, Tamari Soy Sauce (Water, Soybeans, Salt, Sugar), Distilled Vinegar, Sugar, Salt, Caramel Color, Garlic & Onion. Contains: Soy." The word doing the work there is tamari. Conventional soy sauce is roughly half wheat; tamari is the wheat-free style, and this one's sub-list is water, soybeans, salt and sugar with no wheat in it. McCormick's allergen policy explains what the claim on the bottle means: "If any product has a Gluten Free claim, the product and the manufacturing line has been validated Gluten Free."

The theoretical risks, named honestly. Malt vinegar is made from barley and would be a genuine problem, but we could not find a bottled retail liquid smoke that lists it; the US brands use distilled vinegar or none. Caramel colour can in principle start from a wheat-derived starch, though it is overwhelmingly made from corn in North America. Molasses is sugarcane and is never a gluten source. On all three counts, the brands above have published a gluten statement that covers the finished product, so the reasoning is redundant.

The one real gap is not the bottle, it's "smoke flavor" inside other foods. Dry, powdered smoke flavouring sometimes uses barley malt flour as a carrier. Gluten Free Watchdog reports that in USDA-regulated foods "IF a protein ingredient is used as a carrier for the smoke flavoring then the protein ingredient must be declared by its common or usual name (i.e., barley malt flour)," but that for FDA-regulated foods "it is unclear at this time whether barley malt flour must be included in the ingredients list when used as a carrier for smoke flavoring." FALCPA forces wheat to be declared; it does not cover barley or rye. So "natural smoke flavor" buried in a sausage, a jerky, a BBQ sauce or a bagged snack is a different and weaker question than the bottle, and that is where to put your attention.

How much risk is this?

Celiac disease: the three named brands are a green light, each on its own manufacturer's statement. Worth saying plainly rather than inflating: this is a seasoning you use a quarter to half a teaspoon of at a time, from a 3.5–5 oz bottle that lasts a year. Even a hypothetically imperfect bottle would contribute a trivial amount of anything. That is not a licence to use an unlabelled brand you can't identify, but liquid smoke belongs near the bottom of your worry list, well below the marinades and rubs you'd use it in.

Non-celiac gluten sensitivity: a non-event.

Wheat allergy: no wheat is declared on any of the three panels, and US labelling would force a declaration if there were. Stubb's declares soy, the allergen that actually matters on that bottle.

Where to spend the attention instead: the smoked foods, not the smoke. Bottled BBQ sauces, marinades, smoked sausages, smoked deli meats and "smokehouse" seasoning blends are where soy sauce, malt and barley-carried smoke powders turn up. Read those labels properly; buy the liquid smoke and stop thinking about it.

What to have instead

Approach with care: "smoke flavor" as an ingredient inside a finished product that carries no gluten-free claim, and bulk-bin or unlabelled smoke powders and smokehouse rubs, which are where the barley-malt carrier question actually lives.

Related questions

Is Wright's liquid smoke gluten-free? Yes. B&G Foods states it on the product page, "Wright's® is gluten-free and Non-GMO Project Verified", and the panel is only water and hickory smoke concentrate.

Is Colgin liquid smoke gluten-free? Yes. Colgin's FAQ answers it in one line: "Yes, Colgin Authentic Liquid Smoke is gluten free." That covers the vinegar, molasses and caramel colour on its panel.

Is Stubb's liquid smoke gluten-free? Yes. McCormick labels it gluten-free, and under McCormick's policy a gluten-free claim means the product and the line have been validated. It uses tamari rather than conventional soy sauce, which is why the claim is possible.

Does the vinegar in liquid smoke matter? Not on these brands. Distilled vinegar is treated as gluten-free even when it started from a grain, because distillation leaves the proteins behind, and malt vinegar, which is the one that would be a problem, doesn't appear on US liquid smoke labels.

Is "smoke flavor" on an ingredient list gluten-free? Not automatically. Dry smoke flavouring can use barley malt flour as a carrier, and it isn't clear that FDA-regulated labels must declare it. In a product with a gluten-free claim you're covered; in one without, it's an open question worth a call to the manufacturer.

Is caramel colour gluten-free? In practice yes in North America, where it is made from corn. On the bottles here you don't have to take a view: the manufacturers have made a gluten-free claim about the finished product, which covers every ingredient in it.

How we checked

Overall source tier: B. Each brand row above is genuinely tier A for that brand, Wright's, Colgin and McCormick have all spoken to the gluten question about their own product. But this is a category page, and a category verdict cannot inherit one company's document, so we cap it below A. No celiac organisation has published a ruling on liquid smoke as a category, which is what would lift it. What actually holds the verdict up is that the category's base composition is smoke and water, and three of three major brands independently confirm it.

We could not name a single bottled liquid smoke brand that contains gluten. That is why this is gluten-free and not depends. There is no failing product to point you at, so the residual risk goes in a caveat rather than the verdict.

Last verified: 13 August 2026. Manufacturers reformulate without notice. If you're holding a supermarket own-label or an imported bottle we haven't named, read the panel: water and smoke concentrate is settled, and a printed gluten-free claim settles everything else.