A nutrient claim is a word or phrase on a food label that describes the level of a nutrient in that product. Terms like “low fat,” “high in fiber,” “calorie-free,” and “excellent source of vitamin C” are all nutrient claims, and in the United States, every one of them must meet specific thresholds set by the FDA before a manufacturer can print them on a package. These aren’t marketing suggestions. They’re legally defined terms with exact nutritional criteria behind them.
How Nutrient Claims Work
The Nutrition Labeling and Education Act of 1990 gave the FDA authority to regulate the words manufacturers use to describe nutrient levels in food. Under this system, a company can’t slap “low sodium” on a box of crackers unless the product actually meets the FDA’s numerical definition of “low sodium.” The same applies to every descriptor you see: free, low, high, reduced, lite, good source of, and more.
Nutrient claims fall into two broad categories. Absolute claims describe the nutrient level on its own (“low fat,” “high protein,” “calorie-free”). Comparative claims measure a product against a reference food (“reduced sugar,” “lite,” “less sodium than regular chips”). Both types have specific cutoffs a product must hit.
Even a simple quantitative statement can cross into nutrient-claim territory depending on how it’s worded. Printing “200 mg of sodium” on a label is fine as a neutral fact. But printing “only 200 mg of sodium” implies the level is low, which means the product either needs to meet the FDA’s criteria for a “low sodium” claim or carry a disclosure statement saying it doesn’t qualify.
Common Thresholds for Absolute Claims
The FDA ties most nutrient claims to a product’s Reference Amount Customarily Consumed, which is essentially a standardized serving size. Here are some of the most common terms and what they actually require:
- Calorie-free: Less than 5 calories per serving.
- Low-calorie: No more than 40 calories per serving.
- High, Rich In, or Excellent Source Of: The food contains 20% or more of the Daily Value for that nutrient per serving.
- Good Source Of: The food contains 10% to 19% of the Daily Value per serving (though the regulation for “high” starts at 20%, “good source” fills the tier below it).
So when a cereal box says “excellent source of iron,” it means one serving delivers at least 20% of the iron you need in a day. A “good source” label means you’re getting a meaningful but smaller contribution.
How “Light” and “Reduced” Claims Are Measured
Comparative claims require a direct comparison to a standard version of the same type of food. The rules depend on what kind of nutrient is being reduced and how calorie-dense the original food is.
For “light” or “lite” labels, the math works like this: if the original food gets 50% or more of its calories from fat, the lite version must cut fat by at least 50%. If the original gets less than half its calories from fat, the lite version must either cut calories by at least one-third or cut fat by 50%. For products that are already low in both calories (40 or fewer) and fat (3 grams or less), “light” can instead mean a 50% reduction in sodium.
“Lightly salted” has its own rule: the product must contain 50% less added sodium than is normally used in that type of food. And “reduced” claims across the board generally require at least a 25% reduction in the target nutrient compared to the reference product.
What Happens When a Product Is High in Something Else
A food can qualify for a positive nutrient claim and still be high in fat, sodium, or cholesterol. When that happens, the FDA requires a disclosure statement printed right next to the claim. If a product contains more than 13 grams of fat, 4 grams of saturated fat, 60 milligrams of cholesterol, or 480 milligrams of sodium per serving, the label must include a note like “See nutrition information for fat content.”
This disclosure has to appear in boldface type, directly adjacent to the nutrient claim with nothing else between them. If the claim shows up on multiple panels of the package, the disclosure must appear alongside it on every panel except the one that already carries the Nutrition Facts label. There are also size rules: the claim text itself can’t be more than twice as large as the product’s name, preventing manufacturers from making the health pitch visually dominate the package.
Nutrient Claims vs. Health Claims vs. Structure/Function Claims
Food labels can carry three distinct types of claims, and they’re regulated very differently.
Nutrient claims describe what’s in the food: “low fat,” “sugar-free,” “high in calcium.” They say nothing about disease or body function. Health claims go a step further by linking a food or nutrient to a reduced risk of disease, like “diets low in sodium may reduce the risk of high blood pressure.” These must be pre-approved by the FDA before they can appear on a label, and they always require two components: a substance and a disease.
Structure/function claims describe what a nutrient does in your body without mentioning disease. “Calcium builds strong bones” and “fiber maintains bowel regularity” are classic examples. Unlike nutrient claims and health claims, structure/function claims on dietary supplements don’t need FDA pre-approval, though manufacturers must notify the FDA within 30 days of using one. Supplements carrying these claims must also include a disclaimer stating the FDA hasn’t evaluated the claim and the product isn’t intended to diagnose, treat, cure, or prevent any disease.
The Updated “Healthy” Claim
In December 2024, the FDA finalized new rules for when manufacturers can label a food “healthy.” The old definition focused mainly on limiting fat and certain nutrients. The updated version takes a more holistic approach: a product must contain a meaningful amount of food from at least one food group recommended by the Dietary Guidelines for Americans (fruits, vegetables, whole grains, lean protein, low-fat dairy) while staying under specific limits for added sugars, saturated fat, and sodium.
The thresholds vary by food type. A grain product needs to contain at least three-quarters of an ounce of whole-grain equivalent and can’t exceed 5 grams of added sugar, 230 milligrams of sodium, or 1 gram of saturated fat per serving. A dairy product gets a slightly higher saturated fat allowance (2 grams) but a tighter added sugar limit (2.5 grams). Fruit and vegetable products are held to just 1 gram of added sugar.
Whole, unprocessed foods that are already recommended by the Dietary Guidelines, like plain fruits, vegetables, eggs, nuts, seeds, and seafood, automatically qualify for the “healthy” label as long as nothing has been added besides water. The FDA is also exploring a standardized symbol that could appear on qualifying products, making it easier to spot them while shopping.
How EU Rules Compare
The European Union regulates nutrient claims under a similar philosophy but with different measurement systems. Where the FDA bases most thresholds on a per-serving basis, the EU typically uses per 100 grams for solids and per 100 milliliters for liquids.
A few comparisons illustrate the difference in approach. To be labeled “low fat” in the EU, a solid food must contain no more than 3 grams of fat per 100 grams. “Fat-free” requires no more than 0.5 grams per 100 grams. “Low in sugars” means 5 grams or less per 100 grams for solids, and “sugars-free” means 0.5 grams or less. “Energy-reduced” products must contain at least 30% fewer calories than the standard version.
The EU also sets combined limits for certain nutrients. A “low saturated fat” claim requires that saturated fat and trans fat together don’t exceed 1.5 grams per 100 grams, and that they provide no more than 10% of the product’s total energy. This combined approach is stricter than evaluating saturated fat alone. If you’re reading labels on imported foods or shopping internationally, keep in mind that a “low fat” product in one country may not meet the threshold in another.