What are the FTC and FDA rules for supplement advertising?
In the US, the FDA regulates what a supplement's label may claim, and the FTC regulates whether its advertising is truthful and backed by evidence. Supplements may make structure/function claims with the FDA disclaimer, but never disease claims. Every objective claim in an ad, on a website or in a creator post needs competent and reliable scientific evidence.
- Two regulators, one standard of honesty: FDA oversees labels and claim types; the FTC oversees ads, websites, email, social posts and endorsements.
- Structure/function claims are allowed under DSHEA with the FDA disclaimer and an FDA notification within 30 days of marketing.
- Disease claims are not allowed for supplements, wherever they appear, including social media and customer testimonials you share.
- Evidence must match the claim: the FTC expects competent and reliable scientific evidence, generally randomized controlled trials for health benefit claims.
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Do the FDA and FTC both regulate supplement marketing?
Yes. The FDA has primary responsibility for supplement labeling, which covers the package, inserts and claim types. The FTC has primary responsibility for advertising, which covers websites, paid ads, email, social media and endorsements. The two agencies coordinate and sometimes send joint warning letters to companies making disease claims.
The line matters less in practice than people think. FDA can treat disease claims made anywhere in your marketing as evidence of how a product is intended to be used. The FTC, in turn, looks at the net impression of an ad, including images, product names and testimonials, not just the literal words. A compliant label does not make a non-compliant ad safe.
The core federal sources
- The Dietary Supplement Health and Education Act of 1994 (DSHEA), which defines supplements and allows structure/function claims.
- FDA's rule on structure/function statements, 21 CFR 101.93, which sets the notification and disclaimer requirements.
- The FTC's Health Products Compliance Guidance (December 2022), which explains substantiation for health claims.
- The FTC Endorsement Guides (revised 2023) and the FTC rule on fake reviews and testimonials (effective October 2024).
What kinds of claims can a supplement make?
A supplement can make structure/function claims, FDA-authorized health claims, qualified health claims and nutrient content claims, each with its own conditions. It cannot make disease claims. Most marketing copy uses structure/function claims, so the boundary between "supports normal function" and "treats a condition" is where most problems start.
| Claim type | Example of the form | Allowed? | Conditions |
|---|---|---|---|
| Structure/function | "Calcium builds strong bones"; "supports healthy digestion" | Yes | Truthful and substantiated; FDA disclaimer; FDA notified within 30 days of first marketing |
| Authorized health claim | Links a nutrient to reduced risk of a disease, in FDA-approved wording | Yes, if FDA authorized it | Must use the authorized wording and meet the eligibility conditions |
| Qualified health claim | A disease-risk claim with qualifying language about limited evidence | Only where FDA has issued a letter of enforcement discretion | Wording must follow the FDA letter closely |
| Nutrient content | "High in vitamin C"; "good source of fiber" | Yes | Must meet FDA definitions for the term used |
| Disease claim | "Treats arthritis"; "lowers blood pressure"; "prevents colds" | No | Makes the product an unapproved drug in FDA's view |
The required disclaimer reads: "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." It must accompany structure/function claims on the label. It does not cure a disease claim, and it does not replace FTC substantiation.
Borderline wording to watch
- Named conditions: any mention of a disease, even "for people with" a condition, usually reads as a disease claim.
- Drug comparisons: "a natural alternative to" a medicine implies the supplement does what the medicine does.
- Symptom language: describing relief of symptoms that are characteristic of a disease can imply treatment.
- Images and names: a product name or picture that points to a condition can make the claim without words.
What evidence does the FTC require for supplement claims?
The FTC requires competent and reliable scientific evidence for health-related claims. Its 2022 guidance says that for health benefit claims this generally means randomized, controlled human clinical trials. The evidence must fit the claim: the same or an essentially equivalent formula, a comparable dose, a relevant population and a meaningful result.
Common substantiation gaps
- Ingredient studies at a different dose: research on an ingredient at one amount does not support a product that contains much less.
- Lab or animal studies only: useful background, rarely enough for a claim about effects in people.
- Cherry-picked results: the FTC looks at the totality of evidence, including studies that found no effect.
- Establishment claims: phrases like "clinically proven" or "doctor recommended" require exactly that level of proof.
- Implied claims: a product name, an image or a testimonial can make a disease claim even when the copy does not.
Keep a claims file for every product: the claim wording, the studies behind it, why they apply to your formula and who approved the claim. It is the document regulators, retailers and ad platforms ask for first.
How do FTC rules apply to reviews, testimonials and endorsers?
Endorsements are advertising. A customer testimonial, an expert quote or a creator post cannot make a claim the brand itself could not substantiate. Material connections, such as payment, free product or affiliate commissions, must be disclosed clearly. Reviews must be genuine, and brands may not buy, fake or selectively suppress them.
- Testimonials describing results should reflect what buyers can generally expect, or the ad should clearly say what typical results are.
- Sharing or reposting a customer's disease claim can make it your claim.
- Expert endorsers need real expertise in the area they speak about and must have evaluated the product.
- Incentives for reviews must not be conditioned on the review being positive.
Creator programs carry the most risk here. The details are in our guide to FTC rules for supplement influencer marketing.
What other rules affect supplement advertising?
Federal law is the baseline, not the whole picture. State attorneys general enforce consumer protection laws, some states add product-specific rules, and ad platforms enforce their own policies that are often stricter than the law. Retailers and marketplaces may also ask for documentation before they list a product.
- New dietary ingredients: an ingredient not marketed in the US before October 15, 1994 generally requires a notification to FDA at least 75 days before marketing.
- Manufacturing: FDA's current good manufacturing practice rules for supplements (21 CFR Part 111) apply to the product you are marketing.
- State rules: for example, California's Proposition 65 warning requirements, and a New York law restricting sales of certain weight-loss and muscle-building supplements to minors.
- Ad platform policies: Meta and Google restrict some ingredients, claims and imagery. See Meta and Google ad policies for supplements.
- Email and SMS: CAN-SPAM for commercial email and TCPA consent for marketing texts.
FDA's dietary supplements pages are the starting point for the federal side. Confirm state obligations with counsel in the states where you sell.
How should a supplement brand build a compliant review process?
Build one review step that every claim passes through before it appears anywhere: a single approved claims sheet, a named reviewer, and counsel on anything new. Then hold ads, landing pages, emails, packaging and creator briefs to that sheet. Speed comes from reusing approved claims, not from skipping review.
- Draft claims from the evidence, not from competitor copy.
- Review each claim for disease implications, substantiation fit and required disclaimers.
- Approve exact wording and record where it may be used.
- Brief creative teams and creators from the approved sheet only.
- Monitor live ads, comments, reviews and creator posts, and correct problems quickly.
This article is general information, not legal advice. Ichelon Consulting US builds claims-led campaigns for supplement brands and works alongside your regulatory counsel. See our supplement and D2C health brand marketing approach, or book a call with the US team.
Related pages from the US team
Supplement & D2C Health Brand Marketing
Claims-led growth marketing for US supplement and D2C health brands.
Supplement influencer FTC rules
Disclosures, creator briefs and claim control for sponsored content.
Meta and Google supplement ad policies
Platform rules that sit on top of FTC and FDA requirements.
FDA promotional rules in healthcare marketing
A wider look at how FDA rules shape US healthcare promotion.
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Common questions
Does the FDA approve supplement advertising?
No. The FDA does not approve supplements or their marketing before sale. Brands are responsible for making sure claims are truthful and lawful. FDA oversees labeling and claim types, the FTC oversees advertising, and both can act after a product is on the market, including through warning letters.
What is a structure/function claim for a supplement?
A structure/function claim describes how a nutrient or ingredient affects the normal structure or function of the body, such as "calcium builds strong bones". Under DSHEA it must be truthful and substantiated, carry the FDA disclaimer, and be notified to FDA within 30 days of first marketing. It cannot refer to a disease.
Can a supplement brand use the word "clinically proven"?
Only if it has clinical evidence that supports exactly that claim for its own product or an essentially equivalent formula at a comparable dose. The FTC treats "clinically proven" as an establishment claim, so the brand must have the level of proof the phrase promises. Weak or indirect studies are not enough.
Does the FDA disclaimer protect a supplement from FTC action?
No. The FDA disclaimer is required with structure/function claims on the label, but it does not substantiate a claim or make a misleading ad lawful. The FTC judges the overall impression of an ad and requires competent and reliable scientific evidence for health-related claims, whatever disclaimers appear.
Are customer reviews of supplements covered by FTC rules?
Yes. The FTC treats endorsements and reviews as advertising. Reviews must be genuine, and brands may not buy fake reviews, suppress negative ones or reward only positive ones. The FTC rule banning fake reviews and testimonials took effect in October 2024, and resharing a customer's disease claim can make it the brand's claim.
A note on this guide: it explains marketing practice, not legal advice. Rules on privacy, advertising and insurance change and vary by state, so confirm anything compliance-related with your own counsel.
Want your supplement claims reviewed before the next campaign?
A 30-minute call with the US team. We'll look at your current ads, landing pages and creator briefs and show where claims need evidence, rewording or counsel review.