Understanding Serving Size
The serving size listed at the very top of the Nutrition Facts label is the starting point for understanding everything else on the label. All the numbers below it — calories, fat, sugar, vitamins — are based on that one serving. If the serving size is 15 chips and you eat 30 chips, you need to double every number on the label. Many packages contain more than one serving, even if they look like they are meant for one person. A bottle of juice that seems like a single drink might actually list two or even three servings, which means the total calories and sugar are two or three times what you see at first glance.
Percent Daily Value
The column on the right side of the label shows the Percent Daily Value, written as %DV. This number tells you how much of a nutrient one serving provides compared to what an average person needs in a whole day, based on a 2,000-calorie diet. A simple rule to remember is that 5% DV or less is considered low, and 20% DV or more is considered high. You want high %DV for nutrients like fiber, calcium, iron, and vitamins. You want low %DV for things like saturated fat, sodium, and added sugars. The %DV makes it easy to compare two different products side by side.
Nutrients to Watch
Some nutrients on the label deserve extra attention because they have a big impact on your health. Saturated fat and trans fat can raise your risk of heart disease over time, so look for foods with low amounts of these. Sodium — another word for salt — can contribute to high blood pressure, and many packaged foods contain surprisingly large amounts of it. Added sugars are sweeteners put into food during processing, and eating too much added sugar can lead to cavities, weight gain, and other health problems. On the positive side, look for foods with plenty of fiber, which helps your digestive system work well, and nutrients like calcium and iron that your growing body needs.
The Ingredients List
Below or near the Nutrition Facts label, you will find the ingredients list, which tells you exactly what is in the food. Ingredients are listed in order from most to least by weight, meaning the first ingredient is whatever the product contains the most of. If sugar, corn syrup, or another sweetener appears in the first three ingredients, that food is very high in sugar. Sometimes manufacturers use several different names for sugar — like dextrose, fructose, maltose, or cane juice — to spread it across the list so no single sugar name appears first. Reading the ingredients list alongside the Nutrition Facts label gives you the most complete picture of what you are actually eating.
Marketing Claims on Packages
Food packages often have eye-catching words on the front like “low fat,” “heart healthy,” “all natural,” or “made with real fruit.” These are marketing claims designed to make the product seem healthier than it might actually be. The FDA regulates some of these terms, but many front-of-package claims are chosen carefully to create a positive impression without telling the whole story. A cereal box might say “whole grain” on the front while the Nutrition Facts label reveals it is also loaded with added sugar. The best strategy is to ignore the flashy claims on the front and flip the package over to read the actual Nutrition Facts label and ingredients list.
Using Labels to Make Better Choices
Now that you know how to read a food label, you can use this skill every time you shop for groceries or pick a snack. Try comparing two similar products — like two brands of granola bars — and see which one has less added sugar and more fiber. Look at the serving size first to make sure you are comparing equal amounts. Over time, reading labels becomes quick and automatic, like reading a clock. You do not need to track every single nutrient, but paying attention to the basics — calories, added sugars, sodium, and fiber — can help you make choices that keep your body healthy and energized.
Why Food Labels Matter
Food labels exist because people deserve to know what they are putting into their bodies. Before nutrition labeling was required, companies could put almost anything in packaged food without clearly telling consumers. Today, the Nutrition Facts label is one of the most powerful tools for making informed decisions about food. As you grow up and make more of your own food choices, this knowledge will help you fuel your body well for school, sports, and everything else you do. Being a smart label reader is a skill that will serve you for the rest of your life.
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