Blog
How to Read a Structure Function Claim on a Supplement
A structure function claim says how a nutrient affects the normal structure or function of the body. It cannot name or imply a disease, and it must travel with a notice that FDA has not evaluated it. The Reviralis label makes no such claim about a disease, and its sales page lines should be read the same way.
Written by the Reviralis label deskUpdated · 4 min read
The definition01
What is a structure function claim?
It is a statement about how a nutrient or ingredient affects the normal structure or function of the body. A supplement may make one, but it may not claim to diagnose, treat, cure or prevent a disease (FDA, Structure/Function Claim Notification).
The trade-off is that FDA does not approve the statement first. Instead the label has to carry a notice, and the maker must have support for the claim. FTC adds that health claims need competent evidence behind them (FTC, Health Products Compliance Guidance).
The notice02
What notice must travel with a structure function claim?
The notice says FDA has not evaluated the statement and that the product is not intended to diagnose, treat, cure or prevent any disease (FDA, Structure/Function Claim Notification).
The Reviralis label carries the standard wording: "These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease." The notice is the sign of a supplement claim. It does not make the statement true or false.
It also means a reader should not treat any line next to it as FDA-checked. The guide to the notice goes through each part.
A quick test03
Is this line a structure function claim or a disease claim?
Ask whether the line is about a normal body process or about a condition. The first is allowed in this form. The second moves the product toward a drug.
| Wording | Type | Why |
|---|---|---|
| "Calcium builds strong bones" | Structure or function | Normal body process, no disease |
| "Prevents osteoporosis" | Disease claim | Names a disease |
| "Supports a calm stress response" (sales page (Reviralis sales page)) | Reads as function | No disease named; no study of the product cited |
| "quiet the internal signal your body sends before an outbreak" (sales page) | Shifts toward a condition | "Outbreak" points to a disease the label never names |
We do not rule on what is legal. We only note which wording leans toward a condition, since FTC says a disease claim can be implied (FTC, Health Products Compliance Guidance).
Reviralis: from $49 a bottle60 capsules a bottle · 2, 3 or 6 bottles · free US shipping on 3 and 6 · 60-day money-back guarantee
See packsEvidence04
Does a lawful claim mean the product works?
No. A lawful claim means the wording stays inside the rules, not that the product has been shown to do what it says.
No study we found tested Reviralis Complete, and no source shows that it or its ingredients prevents or reduces herpes outbreaks. Herpes has no cure. Prescription antivirals are the proven care, and a supplement is not a stand-in for one. If you were prescribed an antiviral, keep taking it.
Is a disease named or implied? Is an amount printed? Is the same amount tested in people? Two "no" answers mean the claim is a hope, not a finding.
The seller's lines are weighed one by one on the is it legit page, and the broader legal split is in dietary supplement vs drug.
FAQ05
Reviralis questions people ask
Who decides if a structure function claim is true?
The maker must be able to support it, and FTC expects competent evidence for health claims (FTC, Health Products Compliance Guidance). FDA does not check the statement before sale. A reader should ask what was measured, in whom and at what amount.
Why does the notice say not evaluated?
Because FDA does not review a supplement's claims before sale. The notice tells readers that the statement is the maker's, not the agency's (FDA, Structure/Function Claim Notification). It is not a finding about the product.
Can a claim mention stress or mood?
It can describe a normal function in general terms, but it must not imply a disease. Whether a given line stays on the right side depends on its full wording. We read such lines against the evidence, not against the law.
Where do I report a problem with a supplement claim or reaction?
FDA runs MedWatch for adverse events (FDA, MedWatch). For a misleading claim, write to the seller. Keep the bottle, the lot number and the date you started, because they help any review.
Who wrote this06
Written and reviewed by
Pages built from the label, the order page and linked NIH, FDA, FTC, Mayo Clinic and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site for a USA Authorized Reviralis Retailer. It is not the manufacturer or the distributor named on the label. We earn money when you buy through our order links.
Keep reading
More about Reviralis
USA Authorized Reviralis Retailer
Ready to try Reviralis?
Read the label warning, check your medicines with your doctor or pharmacist first, then pick a pack. Six bottles cost the least per bottle; three and six ship free in the US; every pack carries the 60-day money-back guarantee.
- Secure checkout on the sales site
- 60-day money-back guarantee
- Ships from the U.S.