Read a Nutrition Facts label step by step
Compare foods using serving size before interpreting the numbers.
Food packaging is crowded with claims. The Nutrition Facts panel gives you a consistent place to start, but it still needs context. Use it to compare similar products and understand the amount you actually eat, rather than sorting every food into a good-or-bad category.
Begin with serving information
Check both the listed serving size and the number of servings in the container. A package can contain more than one serving. If you eat a different quantity, the nutrients consumed differ from the per-serving figures. This is arithmetic, not a judgment about your choice.
Compare like with like
Put two similar foods side by side and check whether the serving amounts match. If they do not, compare equivalent quantities. A smaller printed number can simply reflect a smaller serving. An illustrative product with two servings per container would provide twice its listed per-serving nutrients if you ate the entire container.
Choose a relevant question
Instead of scanning every number, decide what matters for the comparison: perhaps sodium, added sugars, or fiber. Consider taste, cost, allergens, and how the food fits the meal as well. Medical dietary targets should come from your care team, not a package’s general reference figures.
Try this next
- Check serving size and servings per container.
- Compare equivalent amounts.
- Read ingredients separately when checking allergens.
Source and context
FDA explains that serving size describes a typical amount consumed, not a recommendation, and nutrient figures generally refer to that serving. FDA: Understanding Nutrition Facts ↗
Source checked November 1, 2026. The routines, comparison questions, and examples in this article are original editorial planning suggestions, not clinical protocols or findings from a trial. A source link does not imply agency endorsement.