Supplement Label Requirements: A Complete FDA Compliance Guide

The dietary supplement industry generates over $60 billion in annual U.S. revenue, and every single product on the market must carry a label that meets the FDA's requirements under the Dietary Supplement Health and Education Act (DSHEA) of 1994 and its implementing regulations in 21 CFR Part 101. This guide from CoreXponent covers every required element in detail, so you can launch with confidence and avoid the compliance mistakes that cost brands thousands of dollars in redesigns, reprints, and regulatory responses.

Overview of FDA Supplement Labeling Regulations

Unlike pharmaceuticals, dietary supplements do not require FDA pre-market approval. However, the FDA retains broad authority to take enforcement action against supplements that are misbranded — meaning their labels fail to include required information, include false or misleading claims, or do not follow the prescribed formatting rules. The primary regulations governing supplement labels are 21 CFR 101.36 (Supplement Facts) and 21 CFR 101.9 (general labeling), along with guidance documents the FDA publishes to clarify specific requirements.

Required Label Elements

Six elements must appear on every dietary supplement label. Omitting any one of them renders the product misbranded.

Product Name and Statement of Identity

The principal display panel (PDP) must show the product name and the term "dietary supplement" (or a more specific variant like "herbal supplement" or "protein supplement"). The statement of identity must appear in a type size reasonably related to the most prominent text on the PDP. The purpose of this requirement is to ensure the consumer knows at a glance that the product is a dietary supplement and not a food or drug.

Net Quantity of Contents

Declared in the lower 30 percent of the PDP, the net quantity tells the consumer how much product is in the container. For solid-form supplements, the standard declaration is a count — "90 Capsules," "120 Tablets." For powders and liquids, you must declare in both metric and U.S. customary units (e.g., "8 fl oz (240 mL)"). The type size must meet the minimum height requirements specified in 21 CFR 101.105, which are based on the surface area of the PDP.

Supplement Facts Panel

The Supplement Facts panel is the centerpiece of the information panel and is governed in detail by 21 CFR 101.36. It must include:

• The heading "Supplement Facts" in bold type larger than all other text in the panel.
• Serving size in a common household measure (e.g., "1 capsule," "2 scoops (30 g)").
• Servings per container.
• Each dietary ingredient listed with its quantity per serving and percent Daily Value (%DV) based on a 2,000-calorie diet. Ingredients without an established DV receive a dagger symbol (†) and the footnote "Daily Value not established."
• Proprietary blends must list the total weight of the blend and then list each ingredient in descending order of predominance by weight — individual amounts are not required but are increasingly expected by informed consumers.

Ingredient List

All non-dietary ingredients (excipients, fillers, coatings, flavors, colors, flow agents) must be listed in descending order of predominance by weight under the heading "Other Ingredients." This list typically appears directly below the Supplement Facts panel.

Name and Address of Manufacturer or Distributor

The label must include the name and full business address (street address, city, state, ZIP code) of the manufacturer, packer, or distributor. If the name listed is not the manufacturer, a qualifier such as "Manufactured for," "Distributed by," or "Packed for" must precede the company name.

Warning Statements and Disclaimers

If the product contains iron, the label must include a warning about accidental overdose in children. Products with certain ingredients (e.g., psyllium) may require specific warning statements. And if the label carries any structure/function claim, the following disclaimer is mandatory: "This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease."

Supplement Facts Panel Requirements in Detail

Serving Size Determination

The serving size must reflect the amount of the supplement recommended for consumption on the label or in labeling. If the directions say "take 2 capsules daily," the serving size is 2 capsules. The serving size should be expressed in common household terms that are meaningful to the consumer.

Rounding Rules

The FDA specifies rounding increments for each nutrient. For example, calories are rounded to the nearest 5-calorie increment up to 50 calories and to the nearest 10-calorie increment above 50. Vitamin and mineral amounts follow their own rounding increments depending on the nutrient. Failing to follow the correct rounding rules is a common compliance error that can be caught during an FDA inspection or a retailer's third-party review.

Percent Daily Value Calculations

The %DV is calculated by dividing the amount of the nutrient per serving by the Reference Daily Intake (RDI) or Daily Reference Value (DRV) for that nutrient, then multiplying by 100. The 2016 final rule updated many RDIs — for example, the DV for Vitamin D changed from 400 IU to 20 mcg, and Vitamin C changed from 60 mg to 90 mg. Using the outdated values is still one of the most common errors we see on supplement labels.

Allergen Declarations (FALCPA)

The Food Allergen Labeling and Consumer Protection Act (FALCPA) requires that labels clearly identify the presence of any of the nine major food allergens: milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans, and sesame (added in 2023 under the FASTER Act). This can be done by including the common name of the allergen in parentheses after the ingredient name in the ingredient list, or by including a separate "Contains:" statement immediately after the ingredient list. Most brands use both methods for maximum clarity.

While "may contain" or "produced in a facility that also processes" advisory statements are not legally required, they are considered best practice and are expected by major retailers for products manufactured in shared facilities.

Structure/Function Claim Requirements

Structure/function claims describe the role of a nutrient or dietary ingredient in affecting the normal structure or function of the human body. Examples include "Supports joint health," "Promotes digestive regularity," and "Helps maintain healthy blood sugar levels already within the normal range."

To use a structure/function claim, you must:

1. Have substantiation that the claim is truthful and not misleading (the FDA does not review this substantiation in advance, but can request it).
2. Notify the FDA within 30 days of first marketing the product with the claim.
3. Include the mandatory disclaimer on the label in bold type.

Claims that cross the line into disease claims — "prevents heart disease," "treats depression" — turn the product into an unapproved new drug. This distinction is nuanced, and CoreXponent reviews every claim during the label design process to keep your brand on the right side of the line.

GMP Considerations That Affect Labeling

The FDA's current Good Manufacturing Practices (cGMPs) for dietary supplements, codified in 21 CFR Part 111, require that the amount of each dietary ingredient listed on the label is supported by testing. This means your contract manufacturer must verify through identity testing, potency testing, and stability testing that the finished product contains at least the labeled amount of each ingredient throughout its shelf life. If testing reveals that actual amounts fall below the labeled values, the product is misbranded regardless of whether the label is otherwise correctly formatted.

Common Compliance Pitfalls

• Using outdated Daily Values — the 2016 update changed DVs for over a dozen nutrients.
• Omitting the structure/function disclaimer — even one claim without the disclaimer makes the label non-compliant.
• Incorrect type sizes — the minimum type size depends on the total area of the information panel.
• Missing allergen declarations — especially for products that use milk-derived ingredients (whey, casein, lactose) or soy-derived ingredients (lecithin, tocopherols).
• Proprietary blend errors — failing to list the total blend weight or listing ingredients in alphabetical rather than predominance order.
• Unapproved health claims — using language that implies the product can diagnose, treat, cure, or prevent a disease.

How CoreXponent Helps with Compliant Label Design

At CoreXponent, FDA compliance is built into every step of our label design process. We start with a thorough review of your formula, claims, and target market. We then design the Supplement Facts panel according to 21 CFR 101.36, verify all Daily Values against the current reference standards, draft and review every claim for structure/function compliance, and produce a print-ready file that meets your manufacturer's production specifications.

The result is a label that passes retailer compliance reviews, avoids FDA warning letters, and positions your product as credible and trustworthy on the shelf and online.