I've been doing a little research on the internet (we all know how dangerous that can be), and I've read from several sources that one shouldn't use milk in a post-workout shake, as the casein prevents the rapid absorption of protein. My shake has been made of: 1 scoop whey protein, 2 cups milk, 1 banana, 1/2 tbs. flax oil, and 5 tsp. sugar. If the milk is causing a problem, then I have no problem not using it (blended milk gives me a stomachache anyway). I also keep reading about maltodextrin, but I don't know where to find the stuff. What does the group recommend, and where online can I find maltodextrin? Thanks.