Understanding how to read nutrition labels—even if you only visually scan them for a few seconds—is a crucial skill for making informed food choices. The numbers and percentages may seem overwhelming at first, but nutrition labels follow a standardized format that is designed to help you, as the consumer, to quickly evaluate what you are eating. This blog will teach you how to interpret key sections such as serving size, calories, nutrients and percent daily value in order to better manage your diet and overall health.
Start with Serving Size
The first step in reading a nutrition label is to check the serving size and the number of servings in each container. These are listed at the top of the nutrition label and provide the foundation for all of the other information. Serving sizes are standardized and reflect how much people typically eat, not how much they should eat, per se. The amount of food you actually eat is referred to as your portion size.
This distinction is crucial for determining the overall nutritional content of a food item. For example, if a package contains four servings and you eat the entire package in a single sitting (as some of us often do), you must quadruple all the nutritional values, including calories, fat and sodium. Many people overlook this step, which can lead to severely underestimating calories and miscalculating your nutrient intake.
Pay Attention to Calories
It is important that you pay attention to calorie count per serving. Calories indicate how much energy you get from one serving of the food. Scientifically, there is different nomenclature for types of calories. "Small calories" (cal) represent the energy needed to raise the temperature of one gram of water by one degree Celsius at standard atmospheric pressure. The calories in food are considered "big calories" or "kilogram calories" (Kcal) and contain 1,000 small calories. The Calories on nutrition labels provide us with an estimate of how much energy we can expect to extract from food.
While calorie needs vary depending on factors such as age, activity level and body composition, the general guideline used on labels is based on a 2,000-calorie daily diet. By understanding caloric content, you can better determine whether a food fits into your daily energy needs. However, calories alone do not tell the whole story, and nutrient quality matters just as much.
Understand Essential Nutrients
Nutrition labels list several key nutrients that impact health. These typically include:
- Total fat (including saturated and trans fats)
- Cholesterol
- Sodium
- Total carbohydrates (including fiber and sugars)
- Fiber
- Protein
- Vitamins and minerals (such as vitamin D, calcium, iron and potassium)
Health experts generally recommend limiting nutrients such as saturated fat, sodium and added sugars. Excessive intake can increase the risk of chronic diseases, especially cardiovascular ones. On the other hand, nutrients such as dietary fiber, protein, vitamins and minerals are beneficial and should be consumed in adequate amounts.
One important addition to modern labels is “added sugars” which distinguishes sugars naturally present in foods from those added during processing. This helps consumers better understand how much extra sugar they are consuming. The general guideline from the CDC is that we limit our intake of added sugars to less than 10% of our total daily calories. While the number varies between men and women, it is a good baseline to avoid having more than 25-30 grams of added sugars per day.
Utilize Percent Daily Value (%DV)
The Percent Daily Value (%DV) is one of the most useful tools on a nutrition label. It shows how much a nutrient in one serving contributes to a daily diet, based on a 2,000-calorie intake.
A simple rule of thumb from the FDA makes %DV easier to interpret:
5% DV or less = LOW
20% DV or more = HIGH
This means that you should aim for lower %DV values for nutrients you want to limit (e.g., sodium or added sugars) and higher %DV values for nutrients you want more of (e.g., fiber or calcium). The %DV also allows you to compare similar products quickly and choose the healthier option!
Peruse the Ingredients List
We can see that the Nutrition Facts panel provides quantitative data. However, the ingredients list can offer quick, qualitative insight into what’s actually in our food. Ingredients are listed in descending order by weight, meaning the first few ingredients make up the largest portion of the product. Here's what this might mean: if sugar appears near–or at–the top of the list, then the product likely contains a significant amount of added sugar. Checking the ingredients list is also important for identifying potential allergens, additives and highly processed components.
Look at the Whole Picture
One common mistake with our label-reading is that we tend to focus on a single number (usually calories) while ignoring the overall nutritional context. A food may be low in calories but high in added sugars (e.g., yogurt, condiments, instant oatmeals, meal bars). Conversely, a higher-calorie food might be nutrient-dense and beneficial, such as one rich in fiber or healthy fats (e.g., nuts, full-fat dairy, seeds, fatty fish, avocados). A second common mistake is the assumption that "scary-sounding" ingredients are inherently harmful to your body; all ingredients, however, must be listed by their scientific names. For instance, baking soda is always listed as sodium bicarbonate, and riboflavin, pyridoxine and cobalamin are all B vitamins.
With these discrepancies in mind, it is clear that nutrition labels are designed to be used holistically. By considering serving size, calories, nutrients, %DV and ingredients together, you can make more balanced and informed decisions. Reading nutrition labels may feel time-consuming, but over time, it can take just a few seconds while shopping.
Conclusion
Reading nutrition labels is a powerful tool for improving your dietary habits and overall health. By starting with the tips outlined in this blog, you can quickly assess the nutritional quality of any packaged food. Combined with a careful look at the ingredients list, this knowledge empowers you to make smarter, healthier choices every day.
Resources
If you are encountering significant difficulty in obtaining foods whose nutritional values align with your dietary goals, the C-Store offers several forms of produce available for purchase with Colgate Flex Cash. If you are encountering additional financial obstacles or a short-term emergency, the GATE Market program at the Shaw Wellness Institute is open Monday through Friday from 8:30 a.m to 4:30 p.m. The program is free and confidential, and it serves students experiencing food and/or nutrition insecurity.