9. Instant oats
This is the most processed type of oats. The oat grain is boiled, rolled, and then dried before packaging. Instant oats are semi-cooked and are usually found in the ready-to-eat baby cereals that can be prepared just by adding hot or boiling water.
10. Dehulled whole oat grain
If instant oats are most processed, then whole oat grains are the least. Dehulled whole oat grain, also called whole oat groat, is raw oats in their purest form, with 100% of their nutritional value intact.