Are oats gluten free? Oats contain avenin rather than wheat gluten, and most people with coeliac disease tolerate it. Ordinary oats, however, are usually contaminated by wheat, barley or rye kernels. In the EU only oats specially produced to avoid that contamination and meeting the threshold in Regulation (EU) No 828/2014 may be labelled gluten-free.
Why ordinary oats fail
Oats share fields, harvesters, trucks, silos and mills with other cereals. A few stray kernels per kilogram can put a lot over the gluten-free threshold, and because the contamination is particulate it is unevenly spread through the lot.
What the law requires
Regulation (EU) No 828/2014 sets the threshold for the gluten-free statement and adds a condition for oats: they must be specially produced, prepared or processed to avoid contamination. Cereals containing gluten are allergens under Regulation (EU) No 1169/2011; oats are listed among them because of the contamination risk, so ordinary oats must be emphasised in the ingredients list.
How suppliers make gluten-free oats
Two routes exist: a purity protocol that keeps oats separate from seed to pack, and mechanical and optical sorting of standard oats. Both need testing per lot, usually by R5 ELISA on a large, finely ground composite sample. The gluten-free oats guide compares the routes and the evidence to ask for.
Avenin sensitivity
A small share of people with coeliac disease react to avenin itself. That is a medical question rather than a labelling one, but some markets add advisory wording, so check the destination.
Related reading
For formats and stability of the product itself, see oat flakes; for the term, see gluten-free certification.