Oatmeal is a healthy food, as long you pick the right kind. The problem with instant oatmeal is that it has been processed, so it’s broken down more quickly in your body, says Batayneh. As a result, it has a higher glycemic index, which leaves you with unstable blood sugar levels. A lot of instant oatmeal is also flavored, meaning it probably contains artificial flavorings and a lot of sugar, she explains.
The Better Pick: Batayneh recommends sticking with plain oatmeal and sprinkle in some blueberries, cinnamon, walnuts or a little maple syrup to add some flavor. And switch from instant packets to microwavable steel cut oatmeal for a breakfast that is still quick to make, but less processed.