Ingredients on a food label must be listed in descending order by weight, starting with the ingredient that weighs the most in the product’s formula. This single rule governs nearly every packaged food sold in the United States, and getting it wrong can trigger regulatory action from the FDA. Whether you’re launching a granola bar, a hot sauce, or a skincare line, the formatting and naming conventions are more specific than most people expect.
The Descending Weight Rule
Every ingredient in your product gets listed from the heaviest to the lightest, measured by weight at the time of manufacturing. If water makes up 60% of your formula and sugar makes up 15%, water comes first and sugar comes second. This applies to all ingredients regardless of whether they’re liquids, solids, or powders.
Each ingredient must appear by its “common or usual name,” which is the name a typical consumer would recognize. You’d write “sugar” rather than “sucrose,” “salt” rather than “sodium chloride,” and “water” rather than “aqua” (on food labels, at least). The FDA defines a common or usual name as one that accurately identifies the basic nature of the ingredient in the simplest, most direct terms possible. For protein-derived ingredients, the name must specify the food source: “hydrolyzed soy protein” is acceptable, but “hydrolyzed vegetable protein” is not, because it doesn’t tell the consumer where the protein came from.
How to Handle Compound Ingredients
Many products contain ingredients that are themselves made from multiple ingredients. Chocolate chips, for instance, contain sugar, cocoa butter, chocolate liquor, and other components. When you use a compound ingredient like this, you have two options. You can list the compound ingredient by name and follow it with its sub-ingredients in parentheses: “chocolate chips (sugar, cocoa butter, chocolate liquor, soy lecithin).” Alternatively, if the compound ingredient has a standard of identity established by the FDA (like “enriched flour”), you can simply declare it by that standardized name without breaking out every sub-ingredient, unless one of those sub-ingredients is a major allergen.
Sub-ingredients within parentheses also follow the descending weight order, based on their proportion within the compound ingredient itself.
Spices, Flavors, and Colors
The FDA allows certain categories of ingredients to be grouped under umbrella terms rather than listed individually. Spices can simply be declared as “spices” without naming each one. Natural flavors can appear as “natural flavor,” and artificial flavors as “artificial flavor.” This protects proprietary recipes while still informing consumers about what type of ingredient is present.
There are exceptions. Spices that also function as colorings, like paprika, turmeric, and saffron, must be declared as “spice and coloring” unless you list them by their specific common name. Color additives that aren’t subject to certification can be declared broadly as “artificial color” or “color added,” but certified colors (the ones with names like Red 40 or Yellow 5) must be identified specifically.
Allergen Labeling Requirements
Federal law requires that nine major food allergens be clearly identified on labels: milk, eggs, fish, crustacean shellfish, tree nuts, wheat, peanuts, soybeans, and sesame. Sesame was added as the ninth allergen on January 1, 2023, under the FASTER Act.
You can meet this requirement in two ways. The first is to include the allergen’s plain-English name in the ingredient list itself, in parentheses after the technical ingredient name. For example: “casein (milk)” or “lecithin (soy).” The second is to add a separate “Contains” statement immediately after or adjacent to the ingredient list, such as “Contains: milk, wheat, soy.” If you use a “Contains” statement, it must list every major allergen present in the product with no omissions.
For ingredients sourced from animals other than the most common one, the animal source must be named. If your product uses goat milk alongside regular cow’s milk, both “milk” and “goat milk” need to appear. The same principle applies to duck eggs or sheep’s milk.
When Ingredients Can Be Left Off
Not everything that touches your product during manufacturing needs to appear on the label. Incidental additives, those present at insignificant levels with no technical or functional effect in the finished food, are exempt. This covers three main situations: substances added during processing but physically removed before packaging, substances that convert into components naturally present in the food without significantly increasing their levels, and processing aids that are technically present in the final product but at levels too low to have any effect. A common example is a release agent used on manufacturing equipment that leaves trace residues in the food.
These exemptions do not override allergen requirements. If a processing aid contains a major allergen, it still needs to be declared.
Formatting and Font Size
The ingredient statement typically appears on the information panel of the package, which is the panel immediately to the right of the principal display panel (the front of the package). The text must be prominent, conspicuous, and easy to read. The FDA sets a minimum type height of 1/16 inch, measured by the height of a lowercase “o.” Very small packages can use smaller type under specific exemptions outlined in the regulations, but for standard packaging, 1/16 inch is the floor.
The statement usually begins with the word “Ingredients:” followed by a comma-separated list. There’s no requirement to use bullet points or line breaks between ingredients, though some brands choose to for readability.
Cosmetic Labels Follow Different Rules
If you’re labeling a cosmetic product rather than food, the naming conventions change significantly. Cosmetic ingredients must be identified using names from a specific hierarchy of reference texts. The FDA first looks to names it has established itself, then to the CTFA Cosmetic Ingredient Dictionary (now known as the INCI dictionary), then to the United States Pharmacopeia, the National Formulary, and the Food Chemical Codex, in that order. Only if none of these sources lists a name for the ingredient can you fall back on the name generally recognized by consumers, or a chemical or technical description.
This is why cosmetic labels often feature Latin-sounding or scientific ingredient names like “tocopheryl acetate” instead of “vitamin E” or “sodium lauryl sulfate” instead of a simpler description. The INCI naming system is standard across the global cosmetics industry, making it easier for regulators and consumers to identify ingredients across brands and countries.
Small Business Exemptions
Small food businesses can qualify for exemptions from nutrition labeling (the Nutrition Facts panel), but the ingredient list itself is not optional. The FDA offers two relevant nutrition labeling exemptions. One applies to companies with fewer than 100 full-time equivalent employees that sell fewer than 100,000 units of a given product in a 12-month period. The other covers retailers with total annual gross sales of $500,000 or less, or food and supplement sales to consumers of $50,000 or less. Even if you qualify for one of these exemptions and skip the Nutrition Facts panel, you still need a complete, properly ordered ingredient list on your label.