Dietary supplements are regulated as a category of food under the Federal Food, Drug, and Cosmetic Act, as amended by the Dietary Supplement Health and Education Act (DSHEA). That means the U.S. Food and Drug Administration (FDA) does not review or approve a supplement label before it reaches the market. Instead, the responsibility falls on the manufacturer or distributor to ensure the label meets all applicable requirements before the product ships.
That responsibility covers more ground than most companies expect going in. A compliant label needs a statement of identity, a Supplement Facts Panel built to FDA’s specific format, a properly ordered ingredient list, allergen declarations, and any health claims worded and substantiated correctly. Missing or misformatting any one of these pieces is what turns into a warning letter later. Keep reading for a breakdown of each requirement and where labels most often go wrong.
Statement of Identity
The statement of identity is the plain-language name for the product, appearing on the principal display panel. It has to reflect what the product actually is, such as “Calcium Supplement” or “Elderberry Extract.” A marketing name that leaves the actual contents unclear will not meet this requirement. This is often the first thing an FDA reviewer checks, since it sets the frame for everything else on the label.
The label also has to include the term “dietary supplement” or an equivalent term like “herbal supplement.” This clearly identifies the product as a supplement rather than a conventional food or drug. Leaving this term off, or burying it in small print, is a common gap for companies used to food labeling conventions. They often assume the product category is obvious from context, and it is not.
Supplement Facts Panel
The Supplement Facts Panel is the required nutrition label for dietary supplements, and it follows different rules than a standard Nutrition Facts panel used for food. Dietary ingredients without an established Daily Value are listed without one, and zero amounts of a nutrient are not required to appear the way they would on a food label.
The source of a dietary ingredient, and the plant part it was derived from where applicable, can also be listed directly in the panel itself rather than in the general ingredient statement.
Serving size and servings per container are both required, though servings per container does not need to be repeated if it matches the net quantity of contents statement elsewhere on the label.
Ingredient List and Allergen Declarations
Manufacturers must list ingredients in descending order of predominance by weight. This is a straightforward rule in principle, but it is a common source of error when a formula changes and the label does not keep pace with the new ratios.
Labels must clearly declare major food allergens, including milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, and soybeans. This applies even when the allergen appears in a minor or carrier ingredient rather than the primary formula.
Health Claims and Required Disclaimers
Dietary supplement labels can carry structure-function claims. These describe how a nutrient or ingredient supports the normal structure or function of the body. They cannot carry a disease claim, meaning no language implying the product can diagnose, treat, cure, or prevent a disease. This is where a labeling issue can turn into a drug-claim issue, and it is one of the most common reasons the FDA sends a warning letter.
A label with a structure-function claim needs a specific disclaimer stating that the FDA has not evaluated the claim and that the product does not diagnose, treat, cure, or prevent any disease. The company must also back the claim with scientific evidence it can produce if asked. The FTC has actively pursued companies that could not substantiate supplement claims made in labeling and marketing.
New Dietary Ingredients and Facility Registration
Two requirements sit outside the label itself but are part of getting a supplement to market compliantly. If a product contains a dietary ingredient that was not marketed in the U.S. before October 15, 1994, a New Dietary Ingredient Notification, or NDIN, needs to be filed with the FDA before the product goes to market. Separately, facilities that manufacture or hold dietary supplements need to be registered with the FDA, regardless of what the label itself says.
Common Labeling Mistakes
The most frequent issues are not usually about missing information outright. More often, they involve formatting and wording that has not been reviewed against current requirements. Common examples include Supplement Facts Panel font size falling below the required minimum, a structure-function claim missing its disclaimer, an outdated ingredient list after a formula change, or a claim that reads closer to a drug claim than intended. Any of these can trigger a warning letter. If a company leaves the issue unaddressed, the FDA can escalate to product seizure, recall, or civil penalties.
Frequently Asked Questions
Does the FDA approve dietary supplement labels before they go to market?
No. Under DSHEA, the FDA does not pre-review or approve dietary supplement labels, unlike drugs, which go through a formal approval process before they can be marketed. The manufacturer or distributor is fully responsible for making sure the label meets every applicable requirement, including the Supplement Facts Panel format, ingredient listing, allergen declarations, and any claims made, before the product is sold. If a label falls short, the FDA’s main recourse is enforcement after the fact, which is why getting the label right from the start matters more than it would for a category with premarket review.
Can a dietary supplement label make a health claim?
It can make a structure-function claim, which describes how a nutrient or ingredient supports the normal structure or function of the body, such as language about supporting bone health or normal digestion. This has to be paired with the FDA’s required disclaimer and backed by scientific evidence the company can produce if asked. What it cannot do is claim to diagnose, treat, cure, or prevent a disease. That distinction is not always obvious in practice, since wording that sounds like a structure-function claim can cross into a disease claim depending on how it is phrased, which is why claim language is one of the most common areas flagged in FDA warning letters.
What triggers an FDA warning letter for supplement labeling?
The most common triggers include disease claims disguised as structure-function claims, a missing or undersized disclaimer, an ingredient list that does not reflect the current formula, and missing or incomplete allergen declarations. Warning letters can also follow issues with the Supplement Facts Panel itself, such as incorrect serving size information or missing source and plant part details where required. A warning letter is typically the first step, not the only one. If the issues are not addressed, the FDA can escalate to product seizure, recall, or civil penalties.
Do all new ingredients require an NDIN?
Only ingredients not marketed in the U.S. as a dietary ingredient before October 15, 1994, need a New Dietary Ingredient Notification filed with the FDA before the product goes to market. Ingredients already in use before that date are generally considered grandfathered and do not require a new filing on that basis alone. That said, a change in how an ingredient is sourced, processed, or used can sometimes raise the question of whether it still qualifies as the same dietary ingredient, which is worth confirming rather than assuming.
Key Takeaways
- The FDA does not pre-approve dietary supplement labels. Compliance is the manufacturer’s responsibility from day one.
- A compliant label needs a statement of identity, a properly formatted Supplement Facts Panel, an accurate ingredient list, and allergen declarations.
- Structure-function claims are allowed with the correct disclaimer and scientific backing. Disease claims are not allowed at all.
- NDINs and facility registration are separate requirements that sit alongside, not inside, the label itself.
Next Steps for Your Supplement Label
Getting a dietary supplement label right in the U.S. means working through several requirements at once, the statement of identity, the Supplement Facts Panel, ingredient and allergen accuracy, and claim language, and making sure none of them conflict with each other or with what the formula actually contains. It is rarely one single mistake that causes a problem. More often, it is a label that was accurate when it was first built and has not kept pace with a formula change, a new claim added for marketing purposes, or a shift in how the product is positioned.
