Dietary supplement labels are governed by a combination of DSHEA (the Dietary Supplement Health and Education Act of 1994), FDA's implementing regulations at 21 CFR Part 101, and the specific labeling requirements at 21 CFR 101.36. Getting supplement label compliance right means understanding all three — and knowing which compliance gaps draw the most FDA enforcement attention.
Required Elements on Every Supplement Label
A compliant dietary supplement label must include all of the following on the principal display panel or information panel. Missing any one of them is a misbranding violation.
Statement of identity
Every supplement label must include a statement of identity on the principal display panel: the product name and a statement that it is a "dietary supplement" (or a more specific descriptor, such as "herbal supplement," "vitamin supplement," or "mineral supplement"). This isn't optional copy — it's a required label element under 21 CFR 101.3.
Net quantity of contents
The net quantity declaration — the total amount of the supplement by weight, volume, measure, or count — must appear on the principal display panel under 21 CFR 101.7. For solid oral dosage forms, this is typically expressed as a count (e.g., "60 capsules"). For powders, it's weight. The quantity must reflect the actual contents of the container at the time of packaging.
Supplement Facts panel
The Supplement Facts panel is the dietary supplement equivalent of the Nutrition Facts panel. Requirements are detailed at 21 CFR 101.36 and include:
Serving size and servings per container
Calories per serving (if 5 or more)
Every dietary ingredient in the product, with quantity per serving
% Daily Value for nutrients that have an established DV; "†" for nutrients without one
A dagger footnote: "† Daily Value not established"
All other ingredients (excipients, binders, coatings, flavors, colorings) in the "Other Ingredients" list below the panel
The order of listing follows a specific hierarchy under the regulation: vitamins, minerals, herbs, amino acids, other dietary ingredients, then proprietary blends.
Name and place of business
The manufacturer, packer, or distributor name and address must appear on the label under 21 CFR 101.5. For brands that use contract manufacturers, the label must accurately reflect who is responsible for the product — typically the brand owner, not the contract manufacturer.
Directions for use
Dietary supplements must include directions for use so that consumers know how to take the product safely. This is especially important for products with any advisory language about maximum doses.
DSHEA disclaimer (for structure/function claims)
If the label makes any structure/function claim — any statement describing the effect of the supplement on the body's structure or function — the DSHEA disclaimer must appear on the label:
"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."
Under 21 CFR 101.93, this disclaimer must be exact, must appear on the label with each structure/function claim, and must be displayed prominently and conspicuously. Shortening it, paraphrasing it, or placing it in small print on a back panel away from the claims is a violation.
Structure/Function Claims: The Most Enforced Area
Structure/function claims are the highest-risk area of supplement labeling — and the source of the largest share of FDA warning letters to the supplement industry.
A structure/function claim describes an effect on the normal structure or function of the human body. "Supports healthy immune function." "Promotes joint comfort." "Helps maintain healthy blood pressure already within the normal range." These are permissible structure/function claims, provided they are truthful, not misleading, substantiated, and accompanied by the DSHEA disclaimer.
A disease claim characterizes the product as diagnosing, curing, treating, or preventing a disease. Disease claims on a dietary supplement are prohibited — they convert the product into an unapproved drug. "Reduces inflammation" is a disease claim. "Helps control blood sugar" is a disease claim. "Treats anxiety" is a disease claim. The specific language matters less than the net impression the claim creates — FDA and FTC evaluate the totality of language, imagery, and context.
The boundary isn't always obvious, and supplement brands frequently cross it — often in marketing copy rather than on the label itself. FDA's enforcement position is that marketing claims on a brand's website, social channels, and advertising are evaluated alongside label claims. A compliant label paired with disease claims on a product page creates the same enforcement risk as disease claims on the label.
The implied disease claim problem
Many brands believe that avoiding the names of specific diseases is sufficient protection. It isn't. Claims like "lowers cholesterol," "reduces blood sugar," or "helps with arthritis" are disease claims even without naming a disease, because they reference symptoms or conditions that consumers associate with specific diseases. "Supports healthy glucose metabolism" may be a structure/function claim; "lowers blood sugar" is a disease claim. The distinction is about what consumers will understand, not just what the brand intended to say.
Nutrient Content Claims on Supplement Labels
Nutrient content claims on supplement labels — "high in vitamin C," "excellent source of zinc," "100% Daily Value of vitamin D" — are governed by the same regulations as nutrient content claims on food labels: 21 CFR 101.54 for "good source" and "high" claims, and 21 CFR 101.13 for the general framework.
"High" or "excellent source" requires ≥20% of the Daily Value per serving. "Good source" requires 10–19% DV. "More" or "added" requires 10% more DV than the reference food. These thresholds apply regardless of whether the claim appears on a food or supplement — and they're evaluated against the Supplement Facts panel, not against marketing language about what a "meaningful amount" means.
Required Warnings and Notices
Beyond the DSHEA disclaimer, certain supplement formulations require additional warnings:
Iron warning: Dietary supplements in solid oral dosage form containing iron must include a warning on the label under 21 CFR 101.17(e): "WARNING: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6. Keep this product out of reach of children. In case of accidental overdose, call a doctor or Poison Control Center immediately." There is no minimum iron threshold — the warning is required for all iron-containing supplements in solid oral dosage form.
Phenylalanine notice: Products containing aspartame must declare the phenylalanine content under 21 CFR 101.17(f).
Proprietary blend disclosure: If the label uses a proprietary blend, each ingredient in the blend must be listed by name in descending order of predominance, and the total weight of the blend must be disclosed.
Where Supplement Label Compliance Most Often Fails
The failure modes that show up most frequently in FDA warning letters and recall events:
Structure/function claims that cross into disease claim territory — especially in marketing copy where regulatory review is less rigorous than for the label itself.
DSHEA disclaimer that's altered, abbreviated, or missing — brands that paraphrase the disclaimer or omit it from one claims-bearing channel are in violation even if the label copy is correct.
Allergen declarations in "Other Ingredients" — supplement excipients and coatings frequently contain allergen sources (lactose-derived fillers, shellfish-derived glucosamine, gluten-containing binders) that require disclosure. The allergen declaration requirements under FALCPA and the FASTER Act apply to supplements.
Unsupported structure/function claims — DSHEA requires that structure/function claims be truthful, not misleading, and substantiated by competent and reliable scientific evidence. "Substantiated" has a real meaning: it typically requires randomized controlled trials for efficacy claims, not just generally recognized safety of the ingredient.
Missing or incorrect Supplement Facts panel elements — quantity rounding errors, incorrect DV percentages, omitted ingredients, or incorrect ordering in the ingredient hierarchy.
Supplement Label Compliance Is Not a One-Time Review
FDA's regulatory enforcement for supplements is continuous. Warning letters cite claims on websites and social posts, not just on physical labels. Reformulations require label reviews. New products require pre-launch compliance checks. Influencer content creates real enforcement risk.
Truli's AI compliance platform audits supplement labels against current FDA and FTC regulations — checking Supplement Facts panels, structure/function claims, DSHEA disclaimers, allergen declarations, and required warnings. The Claims Hub gives compliance teams a structured system of record for every claim across every channel. Book a demo to see how Truli handles supplement label compliance at scale.
