Linsey – your answer got my curiosity going so I did a google search on the difference between regular and instant oatmeal. I found this from the Ohio State Extension Service:
I heard that old-fashioned oats are more nutritious than the instant kind. Is that true?
On the whole, no: Any kind of oatmeal will give you oat-related benefits you’re looking for.
The biggest difference between instant and old-fashioned (also called “regular rolled”) oats are the way they’re cut and flattened. During processing, oats are steamed lightly to deactivate enzymes and prevent the product from going rancid during storage. Then they’re dried down, and instant oats are cut into smaller pieces for quicker cooking. After that, the oats are “rolled,” or flattened. Instant oats are rolled flatter than old-fashioned oats — again, for quicker cooking.
“Quick cooking” oatmeal is rolled and cut finer than regular, but larger than instant. It isn’t packaged with the extra flavorings that instant often has, but cooks more quickly than old-fashioned.
The fallacy that old-fashioned oats are more nutritious might have arisen from a casual comparison of the Nutrition Facts information. You might notice the old-fashioned label lists more fiber (4 grams) compared with instant oats (3 grams). But that’s mainly because of a difference in serving size: a serving of regular oats, a half-cup dry, contains 40 grams of oats; a serving of regular, non-flavored instant oats contains only 28 grams.
Instant oats often contain additional sugar and flavorings, which increase carbs and empty calories per serving. But still, old-fashioned, quick and instant oats all have the same health benefits.