Oats on the allergen list
The law counts oats among the "cereals containing gluten", alongside wheat, rye and barley. Yet they are the only one of them that can lawfully be sold as "gluten-free".
Annex II of Regulation (EU) 1169/2011 names the gluten cereals: wheat, rye, barley, oats, spelt and kamut. When one of them is an ingredient it must be declared and emphasised in the ingredient list, like any other of the 14 allergens.
The problem with oats is mostly practical. They are usually grown, transported and milled alongside wheat and barley, so ordinary oats on the shelf are often contaminated with gluten from them. That is why, for someone with coeliac disease, plain oats are not a safe choice.
What Regulation 828/2014 allows
A food may say "gluten-free" only if it contains no more than 20 mg of gluten per kilo. For oats the regulation asks for something extra: that they were produced specifically to avoid contamination.
Regulation (EU) 828/2014 sets when a food may carry the "gluten-free" statement: when its gluten, as sold, does not exceed 20 mg/kg. It is a regulated claim with a threshold, not a marketing phrase.
For oats the regulation adds a condition: oats in a "gluten-free" food must have been specially produced, prepared or processed to avoid contamination by wheat, rye or barley, and their gluten content must not exceed 20 mg/kg. That separate supply chain is the difference between gluten-free oats and ordinary ones.
Avenin: why not everyone is the same
Even without contamination, oats have their own protein, avenin. Most people with coeliac disease tolerate gluten-free oats, but a small proportion react to it.
That is why gluten-free oats are not automatically right for everyone with coeliac disease. Whether you can include them in your diet is a decision worth making with your doctor or dietitian.
In practice: plain oats, oat flakes with no claim and oat flour with no claim count as a gluten source. Only a pack that says "gluten-free" changes the picture, and even then the avenin caveat applies.
How to read the pack
Look for the "gluten-free" claim on the product itself, then read the whole ingredient list: the oats may be gluten-free while another ingredient is not.
An oat bar made with wheat flour or barley malt extract contains gluten, whatever it says about its oats. The exception covers oats and only oats.
Watch the wording too. "Gluten-free" is a claim; phrases such as "not suitable for people with gluten intolerance" or "may contain gluten" say the opposite. On Greek packs the claim reads «χωρίς γλουτένη»; on imports it may be "sans gluten" or "glutenfrei".
How Ingredo.app reads it with the Celiac profile
Oats always stay recorded as a gluten source. A "gluten-free" claim cancels nothing; it only changes how strict the warning is, and only when oats are the sole gluten source.
Avoid
- Oats, oat flakes or oat flour with no "gluten-free" claim on the pack.
- Any product with wheat, barley, rye or malt, even if its oats are gluten-free.
Caution, not avoid
- A product that claims gluten-free and whose only gluten source is oats. The app explains avenin and suggests checking with your doctor.
- Never "good match": gluten-free oats never turn green for coeliac disease.
Where the claim comes from
- Only from the label: the source’s gluten-free label, or the ingredient list’s own wording. A negated phrase ("not gluten-free") does not count.
- A user report cannot add or remove it, because it softens a warning for coeliac disease.
Frequently asked questions
Oats are listed among the gluten cereals in Annex II of Regulation 1169/2011. Ordinary oats are often contaminated with gluten from wheat and barley during growing and milling, so they are not considered safe for people with coeliac disease.
Oats specially produced to avoid contamination by wheat, rye or barley, with no more than 20 mg/kg of gluten, as set out in Regulation (EU) 828/2014.
Most people tolerate them, but a small proportion react to avenin, the protein in oats. Talk to your doctor or dietitian before adding them to your diet.
Because the gluten-free claim solves the contamination problem, not the avenin question. The app cannot know whether you are one of the few who react, so it leaves that decision to you and your doctor.