Doing your own dressing is always best, because you know you used the best kind of oil (first mechanically pressed) for it. On the down side, it takes time to make it! If you buy some at the supermarket, just read all the labels and avoid the ones with sugars of any kind, and starch. Right now, I am only using some olive oil and tamari soy sauce on top of my salad. It’s no trouble at all an I enjoy the taste