There's a Difference Between ‘Portion Size’ and ‘Serving Size’

Have you ever looked at the Nutrition Facts label on a food package and wondered what the difference between "portion size" and "serving size" is? You're not alone! Many people don't realize that these terms are not interchangeable and that they can have a big impact on how many calories we consume. In this article, we will discuss the differences between portion size and serving size, and why it matters.

What's the Difference?

Although many people think that “portion size” and “serving size” are one and the same, there is a stark difference between these two terms. Portion size refers to how much food you decide to put on your plate when you sit down to eat, while a serving size is the amount of food that's recommended based on the Nutrition Facts label.This amount often does not correspond to the recommended servings in terms of energy content for meals, which are standardized serving sizes. Although a portion and a serving may contain roughly the same number of calories or grams of sugar, they can vary wildly in terms of which foods they represent – for example, a standard portion size of ice cream might be 1 cup, while a serving size may only be half that amount.

A “portion” is defined as "the amount of food served or provided for consumption at one time". A “serving” is defined as "an amount of food or drink that constitutes an individual's basic daily requirement". For many food products, the serving size is often smaller than the portion. Sticking to these recommended servings can help you avoid extra calories and sugar that may be lurking in larger portions of your favorite foods. For example, it might seem reasonable to have 2 scoops of ice cream for dessert, but 2 scoops are actually double the serving size.

Another difference between portion size and serving size has to do with how they're measured and defined. Portion sizes are often quantified using measuring cups or spoons while serving sizes can be based on physical characteristics such as weight or volume. Serving sizes can also be based on the number of calories, grams of sugar, or other nutritional information.

A final difference between portion size and serving size is how they're regulated. Portions are not regulated by any governmental body, meaning that manufacturers can determine what portions to put into their products. On the other hand, serving sizes are regulated by the FDA, which means that consumers are more likely to get the same serving size each time they purchase a product.

Portion sizes tend to be larger than recommended serving sizes, so reading nutrition labels carefully may not always be enough. Pay close attention to package labelling, and if you're not sure how to compare “portions” and “servings,” ask someone for help. Keeping an eye on portion size and the number of calories in food products can go a long way towards maintaining a healthy, balanced diet.

Why Does This Matter?

Understanding the difference between portion size and serving size is an important step in making healthier food choices. Consuming excessive calories can put you at risk for weight gain or obesity. Therefore, if you're trying to maintain a healthy weight, cutting back on calories and sugar can be challenging. It's important to keep portion and serving sizes in mind when reading nutrition labels and planning your next meal or snack – if you aren't paying attention to how much you're eating, it's all too easy to accidentally over-consume. Most people are used to thinking of portion size in terms of how many ounces they're taking in, but this can be deceiving when it comes to food with a high-calorie density, like nuts or full-fat dairy products. For example, if you have two servings of ice cream, it might seem like you're only getting the equivalent of 1 cup of ice cream, but if you're eating the entire container between two servings, it's actually 2 cups!

Remember, portion size is how much food you decide to put on your plate when you sit down to eat. A serving size, however, is the amount of food that's recommended based on the Nutrition Facts label. Buying or cooking in bulk? Make sure to account for both the portions you plan on eating and any leftovers that will be stored, so you don't accidentally over-consume.

For many food products, the serving size is often smaller than the portion. Sticking to these recommended servings can help you avoid extra calories and sugar that may be lurking in larger portions of your favorite foods. Additionally, the serving size is frequently based on nutritional information like calories, sugar, and fat. If you're trying to limit your intake of these ingredients, it's important to compare the serving sizes listed on food packages with the number of servings you'll be eating.


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The content on this page is for informational and educational purposes only and does not constitute professional medical advice. Patients should not use the information presented on this page for diagnosing a health-related issue or disease. Before taking any medication or supplements, patients should always consult a physician or qualified healthcare professional for medical advice or information about whether a drug is safe, appropriate or effective.