ReferenceA map, a dataset, or a directory. It makes no recommendation.
Yeast Suppliers' Gluten-Free Statements
Links
Fermentis — Part of Lesaffre. No public gluten or allergen statement located. Contact
Lallemand Brewing — No public gluten or allergen statement located. Technical documents sit under Resources → Brewer's Corner, the most likely home for a strain-level statement. Contact form
Omega Yeast — No public gluten or allergen statement located. They publish a Field Guide and a Probrew Strain Directory. Contact
Wyeast Laboratories — Will run a gluten-free propagation on request. See the note below before you rely on that. Contact
Verified 4 August 2026 · Re-check every 3 months
Craig's operating knowledge from the Bard's era is that Wyeast will do a gluten-free propagation if you ask them to — which, if it still holds, makes them the one supplier here with a route to an answer rather than just a statement.
We have not confirmed this with Wyeast for this page. It is an old recollection about a service that may have changed, and it is exactly the kind of claim this section is not supposed to make on someone else's behalf. Ask them directly and get the answer in writing. If you do, tell us what they said and we will correct this page.
The finding, stated plainly
We went looking for a published gluten status statement from each of the major brewing yeast suppliers. None of them publishes one anywhere findable on their public site.
That is not an accusation. They all publish technical documentation, and a gluten or allergen statement may well sit inside a strain-level spec sheet or be available on request. But it is not surfaced, and the practical consequence is the same: you will have to ask, per strain, in writing. Do not plan on downloading a policy page — there is not one.
Supplier claims are their claims
When you do get a statement, it is what that supplier says about its own product. It is not independent verification, not a test result on your lot, and it does not transfer to your label. Treat it as a supplier specification — the way supplier qualification treats every other input.
Our experience
We have not tested any of these products for gluten and have not audited any facility. The date shown means: on that day, we searched each supplier's public site for a gluten statement and recorded what we found — which was, in every case, nothing.
The question that actually matters
Not "is yeast gluten-free." Yeast is a fungus; trivially yes.
The question is what was it propagated on. Commercial yeast grows on a nutrient medium, and some brewing yeast propagation media have historically been barley- or malt-derived. Pitched at volume, medium residue arrives in your wort.
So when you get a statement, sort it — these are not the same claim:
| What it says | What it tells you |
|---|---|
| "Gluten-free," with a ppm figure and a method | The strongest form. A testable claim. |
| "Contains no gluten-containing ingredients" | Silent on the propagation medium and the facility. |
| "Produced in a facility that also processes…" | An allergen disclosure. Honest, and a flag to ask more. |
| Nothing at all | Where they all currently sit publicly. Ask directly, keep the reply. |
A supplier that addresses the propagation medium explicitly has understood the question. Finding out which ones do is most of the value here.
How to approach them / what to ask
Ask about the propagation medium by name. "Is this yeast gluten-free" invites a marketing answer. "What is this strain propagated on, and is any component barley-, wheat-, or malt-derived?" invites a technical one.
Ask per strain, not per company. Propagation can differ across a range, and a company-wide statement may not cover what you are pitching.
Ask for the technical data sheet, not the web page. That is the document you file with the batch record and produce to the FDA if asked — see Who Regulates Your Label.
Ask whether they test, to what threshold, and per-lot or periodic.
Re-ask annually. Media and facilities change; published statements lag.
Then verify where it matters. Yeast is a pre-fermentation input, so an assay can read it — unlike finished beer. See Gluten Testing Methods and Their Limits and Testing Without an In-House Lab.
Help us improve this page
If you obtain a strain-level allergen or gluten statement from any of them, send it to us and we will add it here with attribution to the document. This is the page most likely to be improved by a reader with an inbox.
Related Reading
Verified as of 4 August 2026 — searched each supplier's public site for a gluten or allergen statement and found none surfaced. We did not request strain-level technical data sheets, which is where such a statement would most likely live.