These types of questions are always going to be repeated. Its because we get new members and they all have the same questions. Its ok.
You dont have to grind them. Apparantly, I learned from someone here that quick oats are faster digesting than normal cooked oats, which are slower digesting. So, the quick (1-minute by Quaker) are best pre and post workout.
Just add your oats raw to your shake. I like the texture and consistency. It will settle at the bottom. Just shake it up or drink the bits at the bottom, whatever floats your boat.
Stay away from the instant packets. Instant oatmeal is more processed so that it cooks faster. This also means that it has a higher GI and you digest it faster; it has more sugar.
Remember, Insoluble fiber is the rough, stringy part of a plant that provides bulk as an aid to a healthy gastrointestinal tract. Grains such as wheat bran, whole wheat flour, rye, millet, oats, barley, nuts and seeds are in this category. Soluble fiber helps regulate blood sugar, fat and cholesterol levels.