Depending on the recipe, yes homemade salad dressing is often more healthy than store-bought. When you make your own dressing, you are skipping the additives, preservatives, and extra sugar that many dressings in the grocery store have. However, homemade dressing that have a creamy base may not be super healthy. Everything in moderation, and be sure that the ingredients you are using for a homemade recipe are healthy and good for you!