Serving sizes are the arbitrary division of a food based on how much they expect you to eat or drink in one sitting.
For example, many drinks will based it on 8 or 12 oz, which is a serving of water. But some have begun to realize that you aren’t sharing a 20oz of Pepsi, and put the values for the whole bottle.
By giving the nutritional values based on a specific amount, the consumer can technically make a more informed decision on their eating habits. Though, packaging can still be deceiving.
For example, Pop-Tarts are given with a single pastry as the serving size, but they’re packaged in pairs. This makes it seem like a healthier option than other snacks, because the values are halved compared to what you are likely eating.
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