Can You Call It Gluten-Free? Work the Question in Order
Nothing here grants permission to make a claim. Labeling rules change, enforcement varies, and your product's facts are yours. Use this to understand which questions control and what evidence to assemble — then verify with the agency that regulates your product, and with counsel if a claim is going on a label.
Start here: the question that decides everything
Not "what did the test say." This one:
Did any gluten-containing grain — wheat, barley, rye, or their crossbreeds — enter this product at any point?
Everything downstream depends on the answer, and no amount of testing changes which branch you are on.
Question 1 — did a gluten grain ever enter the product?
If yes, stop here. A product fermented from gluten-containing grain and then treated to remove gluten cannot be labeled gluten-free in the United States. It carries a qualifying statement instead — that it was fermented from grains containing gluten, processed to remove gluten, that the gluten content can't be verified, and that it may contain gluten.1
That is not a technicality about wording. It reflects a real limit: once fermentation has fragmented the gluten proteins, the available tests can no longer reliably measure what remains. The rule follows the science rather than the marketing. The full argument is on Gluten-Reduced Beer Is Not Gluten-Free, and what consumers made of that category is worth reading before deciding how close to the line you want to stand.
If no — the grain bill was gluten-free from the start — continue.
If you are not sure, that's the answer for now. Uncertainty about the grain bill is not a labeling problem, it's a supply-chain problem, and it is the one to solve first: grain source and acceptance, dedicated equipment and facilities, safe transport and custody.
Question 2 — which agency actually regulates your label?
In our experience, brewers routinely assume the TTB governs their beer. For a truly gluten-free beer, often it does not — and this is the single most consequential piece of orientation on the page.
A fermented beverage that is "beer" for tax purposes but is made without both malted barley and hops is not a malt beverage under the Federal Alcohol Administration Act. Its labeling falls under the Food, Drug, and Cosmetic Act, administered by the FDA.2
For a 100% sorghum or millet beer, that usually means no malted barley is present — so the product lands under FDA rules, where a gluten-free claim is available to foods that meet the standard: under 20 ppm gluten, per 21 CFR 101.91. That asymmetry is the whole reason the category can exist at all. The mechanics, and what an FDA label must carry, are on Labeling: FDA vs TTB — read it before you print anything.
Question 3 — what is your evidence, and when was it collected?
Here is where most brewers have the wrong instrument in their hand.
A finished-beer ELISA result is a verification measure. It confirms that a process you already control produced what you expected. It is not a proof measure — it can't establish that gluten was absent from a product whose history you cannot document, because fermentation degrades gluten into fragments that the standard sandwich assay is not designed to count reliably. A competitive assay is built for fermented and hydrolyzed foods, but interpreting it still depends on knowing what went in.
The consequence is blunt: a low number on finished beer cannot reconstruct evidence you never collected. What each method proves, and what it does not, is set out on Gluten Testing Methods.
The evidence that actually carries a claim is assembled before and during production:
- Documented gluten-free grain identity, by lot, from a supplier who can support it
- Custody and transport records that show nothing was picked up along the way
- Equipment and facility controls, and the schedule position they were run in
- Process records for the specific batch
- Finished-beer testing as the check on that chain, not a substitute for it
That chain, end to end, is the top-to-bottom QA worksheet, and the reasoning behind treating pre-fermentation evidence as the load-bearing part is on Truly Gluten-Free.
The questions to take to your regulator or counsel
If you work through the branches above and land on "supportable," these are the questions worth arriving with — answered, in writing:
- Did any gluten grain enter this product, at any stage, including shared equipment, transport, or storage? What documents show that?
- Is this product a malt beverage under the FAA Act, or a food under the FDCA? What in the formulation decides that?
- What is the gluten-free status of every ingredient by lot, and who attests to it?
- What controls stood between this batch and any gluten-containing material, and what records show they were followed?
- What testing was done, by which method, at which stage, with what limit of quantification — and what does that method establish for a fermented product?
- Who signed off, under what authority, and where is that recorded?
If a question has no documented answer, that's the work — not a gap to be filled by another test.
What each branch may say on the label (United States)
The three questions above sort a beer into one of four rows. The rows are what Who Regulates Your Label establishes, with its sources; this table only lines them up against the questions.
| Your answers | Regulator | May it say "gluten-free"? | What the label carries instead |
|---|---|---|---|
| No gluten grain ever entered (Q1: no), no malted barley in the grist (Q2: FDA), evidence chain in hand (Q3) | FDA, under 21 CFR 101.91 | Yes, if the finished food meets the under-20-ppm standard and the pre-fermentation records support it | A Nutrition Facts panel and an ingredient list, described as an alcoholic beverage. Bard's shipped "Truly gluten-free" and "contains no wheat, barley, rye or oats" this way. |
| No gluten grain ever entered, but the evidence chain is missing (Q3) | FDA | Not supportably. A finished-beer test cannot rebuild the records | The work is upstream: lot identity, custody, controls, then the claim |
| Malted barley and hops, gluten removed by processing (Q1: yes) | TTB, under Ruling 2020-2 | No | The required qualifying statement: fermented from gluten-containing grain, processed to remove gluten, gluten content cannot be verified. That is the gluten-reduced category, a different promise. |
| Malted barley and hops, no treatment (Q1: yes) | TTB | No | Nothing about gluten |
Outside the United States the rows change; this table does not cover Canada, the European Union, or any certification scheme's private rules.
What this page does not do
It does not decide your claim for you; the table above says what each branch may print under federal rules, and your records decide which row you are in. It does not cover Canada, the European Union, or any certification scheme's private requirements, all of which impose their own rules on top of federal labeling. And it does not replace the judgment of someone who can review your actual records. It orients; the decision stays with you and the people qualified to advise you.
What the evidence supports
Each source below is named beside the claim it carries on this page; the footnotes hold the full citations.
- TTB Ruling 2020-2, Gluten Content Statements in the Labeling and Advertising… supports: It carries a qualifying statement instead — that it was fermented from grains containing gluten, processed to remove gluten, that the gluten content can't be verified, and that it may contain gluten.1
- TTB Ruling 2008-3, Classification of Brewed Products as "Beer" Under the… supports: Its labeling falls under the Food, Drug, and Cosmetic Act, administered by the FDA.2
Related
- Labeling: FDA vs TTB — which agency, and what the label must carry
- Gluten Testing Methods — what each assay proves
- Truly Gluten-Free — the house standard
- Gluten-Reduced Beer Is Not Gluten-Free — why the distinction matters
- Survey Results — what consumers reported about the reduced category
- Truly Gluten-Free Standard (GFB-TGF, draft) — the proposed definition
Source and validation notes
This page is a routing layer over material published elsewhere on this site; it introduces no new technical or regulatory claim. The two federal rulings cited are the same primary sources used on Labeling: FDA vs TTB and the survey results page. Where this page summarises a rule, the linked page is the authority and controls if the two ever diverge. Nothing here is legal advice, and the page is deliberately scoped to United States federal labeling — other jurisdictions and certification schemes are out of scope rather than covered lightly.