'Made in a Facility That Processes Wheat' — Can Coeliacs Eat It?

It's a judgement call, not a straight yes or no — and that's exactly why these labels are so frustrating. "May contain wheat" and "made in a facility that also processes wheat" are precautionary warnings. They're voluntary, they're not tested against any legal limit, and they don't actually tell you whether gluten is present. They flag a possibility of cross-contamination, not a confirmed amount. So a product carrying that warning might have no detectable gluten at all, or it might have enough to make you ill, and the label alone won't tell you which.

This trips up a lot of newly diagnosed coeliacs, because it sits right next to a much more reliable claim — and the two are easy to confuse.

The key difference: "gluten-free" vs "may contain"

These two things look similar on a pack but mean very different things:

• "Gluten-free" is regulated. To be labelled gluten-free, a food must contain no more than 20 parts per million of gluten — the internationally agreed threshold used across the UK, EU and US. That's a tested, legally backed claim.
• "May contain wheat" / "made in a facility that processes wheat" is voluntary. This is precautionary allergen labelling. There's no standard testing behind it and no legal definition of how much risk it represents. One manufacturer might add it as blanket legal caution; another might mean there's a genuine shared-line risk.

So a certified gluten-free label is the strong signal. A "may contain" warning is a grey area that each person has to weigh up.

How to decide

There's no one right answer — it depends on how sensitive you are and how the product is made. A few things that help:

• Certified gluten-free is the safest choice. If a product is both labelled gluten-free and carries certification, the "may contain" line matters far less, because it's been held to the 20ppm limit.
• Sensitivity varies a lot. Some coeliacs react to tiny traces; others tolerate shared-facility products without issue. Neither is "doing it wrong" — but if you're highly sensitive or recently diagnosed and still healing, it's reasonable to be cautious with "may contain" products.
• When in doubt, the manufacturer can often tell you. Many will explain whether the warning reflects a real shared line or standard legal cover.

Whole foods are a special case

A lot of these warnings appear on naturally gluten-free foods — like plain meat that's been packed in a facility also handling wheat. The food itself, a plain cut of meat, has no gluten ingredient in it. The warning is about the packing environment, not the food. For single-ingredient whole foods, the underlying product is gluten-free; the "may contain" is purely about cross-contamination risk during packing, which for many people is low. That's a different situation from a processed product with lots of ingredients.

What ClearToEat can and can't tell you here

Worth being clear: ClearToEat rates generic foods — chicken, rice, oats, soy sauce and so on — for whether the food itself is gluten-free. It doesn't rate specific brands or track which factory a product was made in, so it can't tell you whether one particular packet's "may contain" warning is a real risk. What it's good for is the underlying question: is this type of food gluten-free in the first place? For the brand-specific and facility-specific side, the packaging and the manufacturer are your best source.

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This article is general information, not medical or dietary advice. Coeliac sensitivity varies between individuals — if you're unsure whether a product is safe for you, check with the manufacturer, your GP, or a registered dietitian.