Structure/Function Claims vs. Disease Claims: The Line That Gets Amazon Supplement Listings Removed

Ask any supplement seller why their listing got taken down and you will usually hear some version of the same story: a phrase that sounded like normal marketing crossed a legal line the seller did not know existed. That line separates structure/function claims, which are legal for supplements, from disease claims, which turn your product into an unapproved drug in FDA's framework and a policy violation in Amazon's. Knowing exactly where it sits is the single highest-value piece of compliance knowledge an Amazon supplement seller can have.

What a structure/function claim is

The Dietary Supplement Health and Education Act of 1994 (DSHEA) created a lane for supplements to describe what they do without becoming drugs. A structure/function claim describes the role of a nutrient or dietary ingredient in affecting the normal structure or function of the human body. "Calcium builds strong bones." "Fiber maintains bowel regularity." "Supports immune health." The category also covers general well-being claims and classical nutrient deficiency claims.

The rules are codified at 21 CFR 101.93, and they attach three conditions:

1. You must have substantiation that the claim is truthful and not misleading, before you make it.
2. The claim must carry the required disclaimer (exact text below).
3. You must notify FDA within 30 days of first marketing a product bearing the claim.

The load-bearing word in all of this is normal. Supporting or maintaining normal function is permitted. Restoring abnormal function to normal, or treating the condition that caused the abnormality, is disease territory.

What turns a claim into a disease claim

FDA's structure/function final rule established ten criteria for identifying a disease claim, restated in plain language in the agency's Small Entity Compliance Guide on Structure/Function Claims. A claim is a disease claim if it explicitly or implicitly:

• Names a specific disease or class of diseases. "Helps with diabetes," "for arthritis," "fights infection."
• Describes the characteristic signs or symptoms of a disease. You do not need to say "arthritis" to make an arthritis claim. "Relieves stiff, painful joints" gets there on symptoms alone.
• Implies disease through the product name. A name built around "cure," "remedy," or a condition does the same work as a bullet point.
• Implies disease through citations, imagery, or symbols. Referencing a study titled for a disease, showing an EKG tracing, or using before/after imagery that depicts recovery from a condition all count.
• Claims to belong to a class of disease treatments. Calling a product an "antibiotic," "analgesic," or "antidepressant" is a disease claim by category.
• Claims to substitute for, or augment, a therapy or drug. "Use instead of your prescription" and "boosts the effectiveness of your medication" both qualify, as does treating the side effects of a therapy.

FDA acknowledges in the compliance guide that there is not always a bright line, and it evaluates the objective evidence in your labeling as a whole. That means the claim is judged in context: a mild phrase surrounded by disease imagery and disease-adjacent keywords reads as a disease claim.

Compliant vs. non-compliant: side-by-side

These pairs show how the same product story can be told on either side of the line.

Disease claim (removal risk)	Structure/function alternative
Relieves arthritis pain	Supports joint comfort and flexibility
Lowers cholesterol	Helps maintain cholesterol levels already within a normal range
Reduces anxiety and depression	Supports a calm mood and relaxation
Fights colds and flu	Supports a healthy immune system
Treats insomnia	Promotes restful sleep
Anti-inflammatory	Supports a healthy inflammatory response
Repairs gut damage from leaky gut	Supports digestive health and gut lining integrity
Controls blood sugar	Supports healthy glucose metabolism as part of a balanced diet

Two cautions. First, the right-hand column is not a free pass: every one of those claims still requires substantiation, the disclaimer, and the FDA notification. Second, rewording is not laundering. If your imagery, testimonials, and keywords still tell a disease story, a softened bullet point does not fix the listing.

The line applies to everything on the page

Sellers audit their bullets and stop there. FDA and Amazon do not.

• Images. A before/after graphic implying recovery, a rendered label with old disease language, or an infographic checkmark next to "arthritis relief" is a claim.
• Testimonials. The moment you publish a customer's "this cured my insomnia" in A+ content or a review-quote image, it becomes your claim. You cannot say through a customer what you cannot say yourself.
• Keywords. Disease terms in your title, backend search terms, or ad targeting signal intended use. Amazon maintains its own restricted keyword lists for supplements that operationalize exactly this.
• Product name and citations. Both appear explicitly in FDA's criteria.

The required disclaimer, verbatim

Every structure/function claim must be accompanied by this statement, in boldface type:

"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."

Use "These statements have not been evaluated..." when the label carries more than one claim. Per 21 CFR 101.93, the disclaimer goes on the label adjacent to the claim or linked to it with a symbol such as an asterisk. Understand what it is not: it is a disclosure requirement, not a shield. A disease claim with a disclaimer under it is still a disease claim.

Why Amazon enforces harder than FDA inspects

FDA regulates tens of thousands of supplement products with a warning-letter process and finite inspection bandwidth. Your listing might carry a disease claim for years without FDA ever looking at it.

Amazon looks at everything, continuously, with software. Its supplement policy incorporates the FDA framework, its detection is algorithmic, and its remedy is not a letter asking you to respond in 15 business days. It is suppression or deactivation, effective immediately, with the burden on you to prove the fix. If that happens, our guides to fixing a suppressed supplement listing and writing a plan of action that gets reinstated cover the recovery path. And claims enforcement travels in packs: the same review that catches disease language also checks your ingredient amounts against your label, which is the core of Amazon's March 31, 2026 misleading-claims enforcement.

The practical conclusion: FDA defines the line, but Amazon is the enforcer you will actually meet. Auditing your listings to FDA's standard is how you stay ahead of both.

Finding your disease claims before Amazon does

The hard part is not understanding the rule. It is applying all ten criteria to every bullet, every image, every A+ module, and every keyword across a whole catalog, including copy written years ago by people who never read the final rule. VERID8 does that scan automatically: it checks your listing text and images against FDA, FTC, and Amazon rules, flags every disease claim with the specific rule it violates, and gives you a compliant rewrite for each one. You can run any single listing through it free.

Sellers rarely lose listings for claims they knew were illegal. They lose them for phrases that sounded like marketing and read, to FDA's criteria and Amazon's scanners, like medicine.