A front label can say “reduced sodium” and still list more sodium than a different product with no special claim. That is possible because the phrases answer different questions. Under U.S. rules, “low sodium” is an absolute nutrient-content claim, “reduced sodium” is a relative comparison, and “no salt added” describes what happened during processing. None of those phrases replaces the sodium line on the Nutrition Facts panel. When choosing between products, use the claim as a shortcut, then compare milligrams using the same serving size.
Low sodium is tied to an actual amount
FDA defines “low sodium” as 140 milligrams of sodium or less per reference amount customarily consumed, with additional rules for certain serving sizes and meal products. “Very low sodium” and “sodium free” use lower thresholds. Because low sodium is an absolute claim, it provides more direct information about the product’s sodium level than a relative claim does. Still, the amount you consume depends on portion size. If the labeled serving is half a cup and you regularly eat two cups, multiplying the sodium along with the serving is more informative than focusing on the wording printed on the front.
Reduced sodium tells you about the comparison, not necessarily a low number
A “reduced sodium” food generally has at least 25% less sodium than an appropriate reference food. Imagine a regular soup with 800 mg per serving: a version with 600 mg represents a 25% reduction and may qualify as reduced sodium, yet 600 mg is clearly not the same as a low-sodium claim. Relative claims are useful when you want a familiar product with less of a nutrient, but they should not be read as a guarantee that the final amount is small. The reference food and serving basis matter, so the Nutrition Facts panel settles how many milligrams the reduced version actually provides.
No salt added can still mean there is sodium
Salt is sodium chloride, but it is not the only source of sodium in food. “No salt added” or “unsalted” means salt was not added during processing under the conditions of the claim; sodium can still be naturally present in ingredients or come from compounds such as sodium bicarbonate, sodium benzoate, or monosodium glutamate. Canned tomatoes, beans, meats, and other foods can therefore show measurable sodium even when no table salt was added. The claim is especially useful for cooks who want to control seasoning themselves, but it is not a synonym for sodium-free.
Serving size and Daily Value put the milligrams into context
The current Daily Value for sodium on U.S. Nutrition Facts labels is 2,300 mg. Percent Daily Value helps show how much one labeled serving contributes to that reference amount. A product’s sodium can also add up through repeated servings: bread, sauces, snacks, cheese, and prepared foods may each contribute moderate amounts that become substantial across a day. For direct product comparisons, first make sure the serving sizes are comparable. A package that looks lower in sodium may simply define a smaller serving. If you eat the whole package, calculate the whole-package sodium or use a dual-column label when one is provided.
Taste is not a reliable sodium meter
Some high-sodium foods taste intensely salty, but others do not because sweetness, acidity, fat, or flavorings mask saltiness. Conversely, a strongly flavored food can be relatively modest in sodium. That makes the label more dependable than your palate for quantitative comparison. Rinsing certain canned foods can reduce surface sodium, but the amount removed varies and the Nutrition Facts panel usually describes the food as sold unless the label states otherwise. If sodium intake is being restricted for a medical reason, use the target provided by your clinician rather than assuming every person should use the same limit.
Read the three claims as three different sentences
The simplest way to avoid confusion is to translate each phrase into plain language. “Low sodium” means the product stays under a defined amount; “reduced sodium” means it has meaningfully less than a reference version; “no salt added” means salt was not added during processing. Then turn the package around and read the sodium milligrams per serving. That two-step habit is faster and more accurate than trying to rank products from front-label wording alone, and it works whether you are comparing soup, beans, broth, sauces, snacks, or frozen meals.
Sources
- FDA — Sodium in Your Diet — Current U.S. definitions for common sodium nutrient-content claims.
- 21 CFR 101.61 — Federal conditions for sodium nutrient-content claims.