Many packaged foods consumed in one sitting are often listed as multiple servings on the labeling. how does consuming multiple servings of a product affect the nutritional values listed on the label?

It depends on how many servings you eat, but you can double the amount of fat/sugar/nutrients. However, it is important that you will have a proper diet and exercise for you to be protected from diseases. The help of being conscious with the nutritional values will make you balance the food you intake.