Making a food label that meets FDA rules means starting with the required elements: the statement of identity, net quantity of contents, ingredient list, nutrition facts panel, allergen declaration, and the name and place of business of the manufacturer, packer, or distributor. These must appear in specific places and formats defined in Title 21 of the Code of Federal Regulations. Get those elements right and the label is legal. Get them wrong and the product can be considered misbranded, which means it cannot legally be sold in interstate commerce.
This guide walks through each requirement in plain language. It covers what the rules actually say, where they are strict, and where manufacturers have some flexibility.
What Are the Mandatory Elements of an FDA-Compliant Food Label?
Every food label regulated by the FDA must carry five core elements, plus allergens when applicable. These are not suggestions. They are legal requirements under the Federal Food, Drug, and Cosmetic Act and its labeling regulations.
- Statement of identity — the common or usual name of the food, in bold type on the principal display panel
- Net quantity of contents — the weight, volume, or count, in both US customary and metric units
- Ingredient list — all ingredients in descending order by weight
- Nutrition Facts panel — the standardized nutrient declaration
- Name and place of business — the manufacturer, packer, or distributor, plus city, state, and ZIP code
The principal display panel is the part of the label most likely to be seen by the consumer at the point of sale. The information panel is the part immediately to the right of the principal display panel. Placement rules depend on which panel an element belongs to.
Allergen labeling is a separate requirement. The nine major food allergens under US law are milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans, and sesame. Sesame was added as the ninth major allergen by the Food Allergy Safety, Treatment, Education, and Research Act, and the requirement took effect in 2023.
How Do You Format the Nutrition Facts Panel Correctly?
The Nutrition Facts panel follows a fixed layout. You cannot rearrange it to suit a design. The order of nutrients, the type sizes, and the use of bold and hairline rules are all specified.
The panel must declare, at minimum:
- Servings per container and serving size
- Calories
- Total fat, saturated fat, and trans fat
- Cholesterol
- Sodium
- Total carbohydrate, dietary fiber, and total sugars (including added sugars)
- Protein
- Vitamin D, calcium, iron, and potassium
Added sugars and vitamin D were added to the required list in the 2016 update to the Nutrition Facts rules. The compliance date for larger manufacturers passed in 2020, and for smaller manufacturers in 2021. If you are looking at an older label template, it may be out of date.
Some nutrients are voluntary. Vitamins A and C, for example, are no longer required but may be listed. When a nutrient is listed voluntarily, it must still follow the same format rules.
Serving sizes are not chosen freely. They are based on the Reference Amounts Customarily Consumed, or RACC, a set of standard serving sizes the FDA maintains for about 150 food categories. A cookie is not a serving of cookies. The RACC tells you what a reasonable single serving is for that category.
What Are the Rules for the Ingredient List?
Ingredients must be listed in descending order by weight. The ingredient that weighs the most goes first. The one that weighs the least goes last. Water is often near the top of beverage labels for this reason, not because it is emphasized.
There are a few exceptions worth knowing. Ingredients present at 2 percent or less by weight may be grouped at the end under a phrase like “contains 2% or less of.” This is common on processed foods and is legal.
Some ingredients can be declared by category rather than by specific name. “Spices,” “natural flavors,” and “artificial flavors” are permitted collective terms. Colors generally must be declared by name, such as “FD&C Yellow No. 5.”
Ingredient names must use the common or usual name. If an ingredient has a standard of identity defined by the FDA, you use that name. Chemical names are not acceptable when a common name exists.
How Do You Declare Allergens on a Label?
Allergen declaration is one of the most heavily enforced parts of food labeling. The nine major allergens must be declared when they are present in the food or in any ingredient, including processing aids and incidental additives.
You have two main options. You can list the allergen in the ingredient list in parentheses after the ingredient that contains it — for example, “whey (milk).” Or you can add a separate “Contains” statement immediately after or adjacent to the ingredient list, such as “Contains: milk, wheat, soy.”
You can use both. You cannot use neither.
One common misunderstanding involves precautionary statements. “May contain” or “made in a facility that also processes” are not required by FDA rules. They are voluntary statements manufacturers use to address cross-contact risk. The FDA has stated that these statements should not be used as a substitute for good manufacturing practices, and their use is not standardized. Some consumer groups argue they are overused and reduce their usefulness for people with allergies.
Where Do Health Claims and Nutrient Content Claims Fit In?
Health claims and nutrient content claims are regulated separately from the mandatory label elements. Getting the basic label right does not automatically make a claim legal.
A nutrient content claim describes the level of a nutrient — “low fat,” “high fiber,” “reduced sodium.” Each of these terms has a specific regulatory definition. “Low fat,” for example, means 3 grams or less of total fat per reference amount. You cannot use the phrase loosely.
A health claim describes a relationship between a food or nutrient and a disease or health condition. These require either authorization by the FDA or a qualified health claim based on supporting but not conclusive evidence. The wording of qualified health claims is specified, and the qualifying language must be included.
Structure-function claims describe how a nutrient affects normal body function — “calcium builds strong bones.” These do not require FDA pre-approval but must carry a disclaimer stating that the FDA has not evaluated the claim and that the product is not intended to diagnose, treat, cure, or prevent any disease.
Any claim that crosses into disease treatment or prevention without authorization makes the product a drug in the FDA’s eyes. That is a significant regulatory shift and not a labeling detail.
What Are the Most Common Labeling Mistakes?
Formatting errors are the most frequent problem. Type sizes below the minimum, missing hairline rules, or a Nutrition Facts panel that has been resized proportionally without regard to the required type specifications are all violations.
Serving size errors are also common. Using a serving size that does not match the RACC for the product category is a misbranding issue, even if the number looks reasonable to the manufacturer.
Missing or incomplete allergen declarations are the most serious category of error, because they carry real health risk. An undeclared allergen can trigger a recall and, in rare cases, a severe reaction.
Net quantity errors happen too. The metric declaration must be present. Some small producers include only ounces, which does not meet the requirement.
Another frequent issue is outdated templates. A label designed before the 2016 Nutrition Facts update may be missing added sugars or vitamin D, or may use the old formatting.
Does the FDA Review Labels Before Products Are Sold?
The FDA does not pre-approve most food labels. Manufacturers are responsible for making sure their labels comply. The agency reviews labels after products are on the market, through surveillance, inspections, and complaint-driven investigations.
This means compliance is largely self-enforced. A manufacturer who gets it wrong may not find out until a warning letter, a recall, or a consumer complaint triggers scrutiny.
Some categories do require pre-market review. Infant formula and certain medical foods fall under different rules. For most conventional foods and dietary supplements, the burden is on the manufacturer.
Working with a regulatory consultant or a labeling software platform can reduce the risk of errors. Neither guarantees compliance. The FDA holds the manufacturer responsible regardless of who prepared the label.
What Changed in Recent FDA Labeling Rules?
The 2016 Nutrition Facts update was the most significant change to food labeling in two decades. It added added sugars and vitamin D to the required list, updated serving sizes to reflect what people actually eat, and changed the format to emphasize calories and serving size.
Since then, the FDA has continued to update specific requirements. The sesame allergen requirement took effect in 2023. The agency has also issued guidance on plant-based milk alternatives and on the voluntary “healthy” claim, though the final rule for “healthy” has been in development for years.
If your label was designed more than a few years ago, it is worth checking against the current rules. Formatting requirements and required nutrients have changed, and a label that was compliant in 2015 may not be compliant today.
Frequently Asked Questions
What are the 5 required elements on a food label?
The five mandatory elements are the statement of identity, net quantity of contents, ingredient list, Nutrition Facts panel, and the name and place of business of the manufacturer, packer, or distributor. Allergen declaration is also required when one of the nine major allergens is present.
Does the FDA approve food labels before they are sold?
No. The FDA does not pre-approve most food labels. Manufacturers are responsible for compliance, and the agency reviews labels after products reach the market.
What are the 9 major food allergens that must be declared?
The nine major allergens are milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans, and sesame. Sesame was added as the ninth major allergen, with the requirement taking effect in 2023.
Can I use “may contain” on my food label?
Yes, but it is voluntary. “May contain” statements are not required by FDA rules and should not replace good manufacturing practices to prevent cross-contact.

