The short answer
Among 30 plain rolled oats sold in France, the differences are negligible: fibre from 8.7 to 11.5 g, protein from 10.8 to 15.4 g, sugars from 0 to 1.8 g, energy from 347 to 395 kcal. In other words: buy the cheapest. The only choice that changes anything is not the brand, it is not buying a sweetened mix.
The unusual result of this comparison: there is nothing to compare
The aisle is segmented: jumbo oats, fine oats, organic, gluten-free, wholegrain, national brand or own label. The nutrition values, however, do not follow.
| Brand and product | Fibre | Protein | Sugars | Energy |
|---|---|---|---|---|
| Priméal, fine oats | 11.5 g | 11.1 g | 1.0 g | 377 kcal |
| Bjorg, rolled oats | 11 g | 10.8 g | 0 g | 363 kcal |
| U, rolled oats | 11 g | 14 g | 1.2 g | 364 kcal |
| Markal, fine oats | 11 g | 14 g | 1.2 g | 364 kcal |
| Markal, jumbo oats | 11 g | 14 g | 1.3 g | 364 kcal |
| Ofal, jumbo oats | 11 g | 14 g | 1.33 g | 364 kcal |
| Marque Repère, rolled oats | 10 g | 14 g | 0.7 g | 372 kcal |
| Carrefour Bio, rolled oats | 10 g | 14 g | 0.7 g | 372 kcal |
| Auchan, rolled oats | 10 g | 14 g | 0.7 g | 372 kcal |
| Aldi, rolled oats | 10 g | 14 g | 0.7 g | 375 kcal |
| Grainea, rolled oats | 10 g | 13 g | 1.1 g | 365 kcal |
| Grillon d’Or, gluten-free | 10 g | 12 g | 0.9 g | 375 kcal |
| Terres & Céréales, wholegrain | 10 g | 12 g | 1.0 g | 371 kcal |
| Chabrior, wholegrain oats | 10 g | 12 g | 1.1 g | 369 kcal |
Eleven grams of fibre against ten, fourteen grams of protein against twelve: these gaps are within the variation from one harvest to the next. On a 60 g portion, the difference between the first and the last in the table is 1.7 g of fibre. That is the equivalent of half a spoonful of chia seeds.
Jumbo or fine oats: no difference in composition
Markal sells both, with exactly the same values: 11 g of fibre, 14 g of protein, 364 kcal. The difference is in texture and cooking time, not nutrition. Fine oats cook faster and make a smoother porridge, while jumbo oats hold up better in a muesli.
Organic does not change the composition, and neither does gluten-free
Carrefour Bio shows 10 g of fibre and 14 g of protein, like the non-organic Auchan and Aldi. Organic is chosen for the farming method, not for the nutritional profile. As for gluten-free, oats do not naturally contain gluten: the label only guarantees the absence of cross-contamination, and it only matters in coeliac disease. See our guide on gluten intolerance.
The only possible mistake in this aisle
It is not in the choice of brand, it is in the choice of product. Next to the plain oats, the aisle sells mixes such as “oats and fruit”, “chocolate oats” and “super breakfast” that go up to 47 g of sugars per 100 g, which is forty-seven times plain oats. These are sweetened breakfast cereals that carry the word oats.
The rule is the same as for peanut butter: read the ingredient list, it should contain just one.
What oats really provide
Ten to eleven grams of fibre per 100 g place oats among the best sources of fibre in the dry goods aisle, and a notable share is beta-glucan, the soluble fibre of oats. A 60 g portion provides about 6 g of fibre, a fifth of the daily reference. The detail is in our guide to dietary fibre.
On micronutrients, 60 g of oats also provide 106 mg of magnesium according to Ciqual, which puts them in our ranking of foods high in magnesium.
Our sources
- Open Food Facts, viewed on 24/09/2026: 30 plain rolled oat products sold in France, selected on an ingredient list containing only oats.
- Ciqual 2025 table (Anses) for the magnesium content of oats.
- As the database is collaborative, an entry may be out of date. The values were checked and the sweetened mixes were excluded from the ranking, then dealt with separately.