Diabetic Salad Dressing: Most salad dressing contain sugar. Diabetic salad dressings are made with no sugar or a sugar substitute. Before buying any product, it is a good idea for those suffering from Type 1 Diabetes, Types 2 Diabetes and Gestational Diabetes to read the labels. A high sugar content can spike blood glucose levels and cause the need for more insulin, other diabetic medications or medical attention.