The correct answer is: consuming multiple servings of a product affects the nutritional values listed on the label by<em> doubling, or even tripling the amount of nutrients and calories consumed</em>.

Most packaged foods, such as potato chips, contain nutrition labels that generally look like this (refer to attached image). As you can see, this label lists the amount of calories and nutrients (carbohydrates, fats, sodium, etc.) found in one serving of chips- which is 1 ounce, or 15 chips. This serving size is fairly small, however, it contains 160 calories (with 60 grams of fat and 15 grams of carbohydrates). As the question states, packaged foods consumed in one sitting are often listed as multiple servings on the labeling; so if a person consumes 45 chips, he or she would be consuming three servings of the chips. This entails consuming 480 calories, instead of 160 calories from one serving.

Thus, consuming multiple servings of a product affects the nutritional values listed on the label by doubling, or even tripling the amount of nutrients and calories consumed.