Is Grolsch gluten free?

Grolsch is brewed from barley malt, so the honest answer is no, it is not gluten free, and it is not safe for anyone with coeliac disease. What makes Grolsch interesting, and what trips so many people up, is that independent home tests have found no detectable gluten above 20 parts per million in it. That sounds like a green light. It is not, and the gap between those two things is the whole point of this page.

What the tests actually show

A coeliac drinker at lowgluten.org has tested two Grolsch beers with the GlutenTox Home Kit, which detects gluten down to a 20 parts per million threshold. Grolsch Premium Lager came back negative in April 2018. Grolsch Kanon came back negative in June 2020. Both results read the same: no indication of gluten above 20 parts per million.

A standard barley lager can test this low because brewing breaks the grain down. The gluten in barley lives in proteins called hordeins, and mashing and fermentation chop a lot of them up, so the finished beer holds less gluten than the raw malt. Grolsch does not use any enzyme treatment or special filtration to remove gluten. It is an ordinary lager that happens to test low, not a beer designed to be safe.

That distinction matters more than the number. Twenty parts per million is the legal ceiling for a gluten free label under EU rules, but the label is a deliberate claim backed by testing on every batch and controls in the brewery. A single home kit result on one bottle is not that. Different batches vary, and Grolsch makes no promise about any of them.

Is Grolsch safe for coeliacs?

No. A barley beer with no gluten free label and no removal step is not a coeliac safe beer, however reassuring a strip test looks. Coeliac UK is plain about it: beer, lagers, stouts and ales contain varying amounts of gluten and are not suitable for a gluten free diet. Their advice points coeliacs to beers that carry the legal gluten free label, not to mainstream lagers that test low on someone’s kitchen counter.

The European coeliac body, AOECS, takes the same line. It only endorses barley beers that go through verified production and formal certification, not ad hoc tested supermarket lagers. And some coeliacs react to beer well under even 10 parts per million, so no informal threshold is a safe one. For coeliac disease, certification is the floor. Grolsch does not clear it.

What about gluten sensitivity?

For non coeliac gluten sensitivity the picture is less clear cut. People with sensitivity do not suffer the same immune damage coeliacs do, and tolerance varies enormously from one person to the next. There is no agreed safe level the way there is for coeliac disease.

So a beer that tests below 20 parts per million might sit fine with some gluten sensitive drinkers and not others. The lowgluten.org tester is careful to say his results are not medical advice, and that is the right framing here too. If you are sensitive rather than coeliac, the test data is a signal worth knowing, nothing more. Individual responses differ, and a low result on one bottle does not guarantee the next one.

What to drink instead

If Grolsch is off the table and you want a clean, crisp lager you can trust, switch to one that is built to be safe rather than one that happens to test low:

• Daura Lager, 5.4%. A Spanish lager brewed from barley then reduced and tested below 3 parts per million, the closest like for like swap for a premium continental lager.
• Bellfield Bohemian Pilsner, 4.5%. Certified gluten free, a proper crisp pilsner for when you want the Grolsch shape without the barley problem.
• Bristol Beer Factory Infinity, 4.6%. A certified gluten free helles lager, soft and easy drinking, from a brewery whose listed beers all carry certified gluten free status.

For the full rundown, see our guide to gluten free lager, or browse the beer directory. If you got here wondering about other big name lagers, we have done the same honest read on Peroni, Corona and Carlsberg.