Rebecca Scritchfield, the DietsInReview.com dietitian, dispels myths and misunderstandings about sugar, and explains which sugars are actually good for you. Sugar can be very a very confusing subject for many people starting a diet. Not all sugar is bad. Fruits and vegetable have sugars, but they are still part of a healthy diet and are good for weight loss. Always look for the ingredients list to see if sugar has been added to processed foods.