How Can I Use Food Package Labels to Compare Products?

Use food package labels in a fixed order: check serving size, compare nutrition values on the same basis, scan ingredients from first to last, then verify front-of-package claims against the details. If serving sizes differ, compare per-100-gram values when available or calculate each product’s nutrients for the same amount. This quick scan separates useful information from claims that leave out context.
What should I check first on food package labels?
Check the serving size first, because it sets the basis for the nutrition numbers that follow. Then look at the nutrition panel, ingredient list, and front-of-package claims—in that order. A claim is easier to evaluate when you already know how much food the panel describes and what the product contains.
- Read the serving size. Note the stated amount and compare it with the amount you expect to eat. A nutrient figure applies to the listed serving, so it may not describe a larger portion.
- Scan the nutrition panel. Focus on the nutrients relevant to your shopping decision. Keep the serving size in view so you do not compare figures based on unlike amounts.
- Read the ingredients from the beginning. Ingredient order helps show which ingredients make up more of the product by weight. It does not, by itself, tell you the exact proportion or the product’s nutritional contribution.
- Check the claim against the details. Look for whether the nutrition and ingredients support the impression created by words or images on the front.
This order reduces backtracking: first establish the amount, then judge the numbers and ingredients, and only then assess the sales message. It is a useful routine when two products look similar but emphasize different claims.
Claims also depend on the type of food. The USDA Food Safety and Inspection Service (FSIS) says “natural” for meat and poultry means a product has no artificial ingredient or added color and is only minimally processed. FSIS says the label for these products must include a statement explaining what “natural” means, such as “no artificial ingredients; minimally processed.” That definition is specific to meat and poultry, so do not assume the same rule applies to every packaged food.

How do I compare two products when their serving sizes are different?
Compare both products using an equal amount of food. If the labels provide values per 100 grams, use those figures directly; otherwise, calculate the amount each product would provide for the same weight or serving. The common basis matters more than whether the package uses a serving size that seems familiar.
For example, if one label reports nutrition for a 30-gram serving and another for a 40-gram serving, their per-serving numbers are not an even comparison. Convert both to the same amount before deciding which has more of a nutrient. To scale a value, divide the listed amount by the serving weight and multiply by the common comparison weight. Keep units consistent throughout.
| Label situation | Quick comparison | What to watch |
|---|---|---|
| Both products show per-100-gram values | Compare those values directly | Confirm you are comparing the same nutrient and units |
| Serving sizes differ | Convert each value to the same weight | Do not compare per-serving figures as if the servings matched |
| Serving sizes match but portions may differ | Compare per serving, then account for the amount you expect to eat | The package serving is a reference point, not a guarantee of your portion |
A common basis makes the arithmetic fair, but it does not decide which product is right for you. Use the same comparison amount to evaluate the nutrients that matter to your needs, then check ingredients and claims. This avoids giving a product an advantage simply because its label uses a smaller serving.
Does the first ingredient on a food label mean there is more of it?
Yes, the first ingredient is generally present in the greatest amount by weight among the listed ingredients; the list is ordered by weight. That is a ranking, not a precise percentage. It also does not tell you which ingredient contributes the most calories or whether the product fits a particular dietary need.
Use the whole list to understand the composition rather than stopping at the first word. If a front claim highlights one ingredient or suggests a particular character, check where that ingredient appears and what else is listed. Ingredient names can answer a different question from the nutrition panel: the list describes what went into the product and in what weight order, while the panel gives nutrient amounts for the stated serving.
The gap between packaging and shopper needs is measurable. In Label Insight’s 2017 Shopper Trends Study, reported by PR Newswire, 67% of surveyed consumers said it was challenging to determine from a package label whether a food met their needs. The study reported that 83% looked elsewhere for food information when packaging and labels were insufficient, and 74% conducted online research. A quick, repeatable label scan can help you identify which detail is missing before you seek more information.
For meat and poultry, FSIS also cautions that “no hormones added” cannot appear on pork or poultry labels unless accompanied by a statement that federal regulations prohibit hormone use in those animals. That is a useful example of why a short claim needs context: read any accompanying explanation and check what product category the claim concerns. When the label does not answer a question important to your decision, record the exact question rather than treating a broad front-panel phrase as a complete answer.
Frequently Asked Questions
Can front-of-package claims like “low fat” or “natural” be misleading?
A claim can be accurate within its definition and still leave out details you need for a comparison. Check the serving size, nutrition panel, and ingredients alongside it. For meat and poultry, USDA FSIS defines “natural” specifically and requires an explanatory statement; that rule does not establish what “natural” means for every kind of food.
How can I tell whether a packaged food fits my dietary needs from its label?
Check the ingredient list for ingredients relevant to your needs, then use the nutrition panel to compare amounts per serving or on a common basis. Do not rely on one front-panel claim as a complete assessment. Label Insight’s 2017 study found that 75% of surveyed consumers examined ingredients before buying to check whether products met their dietary needs.



