Another important thing to remember is quantity. One half cup of rice is approximately equivalent to 2 slices of the “tasty” bread. So if you switch from ½ cup rice to 4 pcs of bread (without butter, mayonnaise or jam), you are consuming more calories. It is also worth mentioning that in making bread, oil or shortening and sugar are added. The oil used may contain trans fats or saturated fats which are not heart friendly and the sugar added, if a lot is not good for diabetics.