You’re in the grocery aisle with two similar boxes. One says “healthy.” The other says “good source of fiber.” You have dinner to figure out and no interest in studying every number.
To read nutrition labels quickly, start with serving size.[1] Then use the 5/20 rule: 5% Daily Value or less is low, and 20% or more is high.[2] Check a few key nutrients to compare foods you already buy.
Key Takeaways
- Serving size is the amount used for the label’s numbers, not a recommendation for how much to eat.
- The 5/20 rule means 5% Daily Value or less per serving is low, while 20% or more is high.
- Choose less saturated fat, sodium, and added sugars, and more fiber, vitamin D, calcium, iron, and potassium.
- As of 2026, federal guidelines limit added sugars to 10 grams per meal. One food at 20% DV already contains that amount.
- Match serving sizes before comparing two foods’ % Daily Values.[1],[2],[3]
What You Need
You need:
- The package: Have the food label in front of you.
- About one minute: The goal is a quick comparison, not a full nutrition analysis.
- Three numbers: Remember 5%, 20%, and 10 grams. 5 and 20 help with % Daily Value, while 10 grams is the federal guideline limit for added sugars in one meal.[3]
At home, a kitchen scale or measuring cups can help you picture a listed serving. Try measuring it once.
Step 1: Start With the Serving Size and Servings Per Container
Start at the top of the Nutrition Facts label. Serving size tells you the amount used for the calorie and nutrient numbers, and servings per container tells you how many servings the package holds.[1] On dual-column labels, use the column that matches the amount you expect to eat.[1]
Is the Serving Size How Much You Should Eat?
No. Serving size reflects what people typically eat or drink, not how much you should have.[1] Think of it as the label’s measuring point.
Step 2: Check Calories for the Amount You’ll Actually Eat
Next, check calories for one serving and adjust the number if you’ll eat more or less than that amount.[1] For example, if one serving has 180 calories and you eat two servings, that amount contains 360 calories.
The 2,000-calorie reference is a general guide for nutrition advice, not a personal calorie target.[1]
Step 3: Use the 5/20 Rule to Read the %DV Column
Next, look at the % Daily Value, or %DV, column. The FDA’s 5/20 rule applies to nutrients with a Daily Value. A serving with 5% DV or less is low, while 20% DV or more is high.[2]
What Does %DV Mean on a Nutrition Label?
The %DV tells you how much one serving contributes toward a nutrient’s Daily Value. Daily Values are reference amounts to consume or not exceed each day.[2]
Step 4: Check the Nutrients to Limit and the Ones to Get More Of
Focus on lower numbers for saturated fat, sodium, and added sugars. For dietary fiber, vitamin D, calcium, iron, and potassium, look for higher %DV numbers.[1] When you’re comparing similar foods, the fiber %DV shows which one contributes more fiber.
What’s the Difference Between Total Sugars and Added Sugars?
Total sugars include natural sugars, such as those in milk and fruit, plus added sugars. Added sugars include sugars added during processing, as well as honey, syrups, and packaged sweeteners.[1]
Why the New Guidelines Are Stricter on Added Sugars Than the Label
Added sugars are one place where the 5/20 rule needs extra context. The Nutrition Facts label uses a Daily Value of 50 grams for added sugars, so 20% DV equals 10 grams.[2] As of 2026, the Dietary Guidelines for Americans set 10 grams as the limit for added sugars in an entire meal.[3]
That means one food at 20% DV reaches the meal limit before you count other foods or drinks.[2],[3] The two federal documents use different benchmarks, so check both the %DV and grams for added sugars.
Step 5: Compare Two Products at the Same Serving Size
To read nutrition labels side by side, start with two similar foods and match the serving sizes before comparing %DV.[1]
Imagine two cereals with the same 1-cup serving size:
| Nutrient | Cereal A | Cereal B |
| Saturated fat | 0% DV | 0% DV |
| Sodium | 8% DV | 8% DV |
| Dietary fiber | 7% DV | 18% DV |
| Added sugars | 8% DV | 20% DV |
Example only. These numbers don’t represent actual products.
Neither cereal wins every row. Cereal B has more fiber, but its 20% DV for added sugars equals 10 grams, the added-sugar limit for an entire meal under the 2025–2030 Dietary Guidelines.[2],[3] Cereal A has less fiber, but its 8% DV for added sugars equals 4 grams. Compare the tradeoffs with the rest of the meal.
Step 6: Read the Ingredient List and Allergen Statement
Ingredients appear in order by weight, with the largest amount first, and some appear under group names such as “flavors” or “spices.”[4] Added sugars may appear as sucrose, dextrose, honey, or corn syrup, so use the Added Sugars line for the amount and the ingredient list to see the sources.[1],[4]
If food allergies matter to your household, check every label. The nine major allergens are milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans, and sesame. On FDA-regulated packaged foods, look for their names in the ingredients or a “Contains” statement.[5]
Why Doesn’t the Front of the Package Tell the Whole Story?
The front of a package aims to catch your attention with statements about fiber, protein, whole grains, reduced sodium, or other features. The Nutrition Facts label gives you a standard format for comparing foods, so flip the package over to check the full panel.[1]
The FDA has proposed a front-of-package Nutrition Info box. It would rate saturated fat, sodium, and added sugars as Low, Med, or High. As of October 2026, the FDA still describes it as a proposal, not a final requirement.[6]
Common Mistakes When You Read Nutrition Labels
- Treating serving size as a recommendation. It tells you the amount used for the label’s calculations, not how much you’re supposed to eat.[1]
- Comparing different serving sizes. Match the serving size before comparing %DV between similar foods.[1]
- Relying only on the front of the package. Turn the package around and use the standardized Nutrition Facts panel for your comparison.[1]
- Confusing total sugars with added sugars. Total sugars include natural and added sugars. Check the separate Added Sugars line.[1]
Make the Label a One-Minute Habit
The next time you read nutrition labels, compare two foods you already buy. Match the serving size first, then use the label to spot the tradeoffs that matter for your meal. The label works best as one decision tool within eating habits that last, not as a scorecard for judging a food.
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Sources Cited
- U.S. Food and Drug Administration. How to understand and use the Nutrition Facts label. FDA. March 2024.
- U.S. Food and Drug Administration. Daily Value on the Nutrition and Supplement Facts labels. FDA. March 2024.
- U.S. Department of Health and Human Services and U.S. Department of Agriculture. Dietary Guidelines for Americans, 2025–2030. RealFood.gov. January 2026.
- U.S. Food and Drug Administration. Types of food ingredients. FDA. 2023.
- U.S. Food and Drug Administration. Food allergies: what you need to know. FDA. 2024.
- U.S. Food and Drug Administration. Front-of-package nutrition labeling. FDA. May 2025.
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