The State of Supplement Claims · Category report
We ruled the 194 best-selling immune listings on Amazon US, from 109 brands, against all 109 published standards. 71% fail, and only 6 listings pass clean. “Boosts immunity”, the phrase the category is sold on, is a High finding at 33 brands. Where it turns Critical, the listing names the disease: a condition word in the title or bullets at 13 brands, “for COVID, flu or colds” at 6, “prevents” at 8. 33 of the 109 brands carry a Critical claim, the class that can get a listing suppressed, on listings that were selling when we read them.
Method · every phrase ruled against FDA structure/function, FTC substantiation and marketplace policy · 109 standards, v1.4.1 · scanned 14-27 Sep 2026 · brands never named in public data · free to cite with attribution
Executive summary
Seven in ten immune listings fail, and 6 pass clean.
138 of the 194 listings received a FAIL verdict, 71% against 76% across all eight categories. These are the bestsellers: vitamin C, zinc, elderberry and the blends built around them.
The word the category is sold on fails.
“Boosts immunity” or “immune booster” appears at 33 of 109 brands, and it is a High finding every time: an unqualified promise to raise a body system’s function, with no measure and no evidence on the page. “Supports normal immune function” is the structure/function form and it is one word longer.
Where it turns Critical, it names the disease.
A condition word in the title or bullets at 13 brands, “prevents” at 8, “relieves symptoms of” at 6 and “for COVID, flu or colds” at 6. The FDA and the FTC have both acted on COVID and cold claims by name.
Immune copy is written in flu season: prevent, fight off, relieve, for colds. Every one of those is a disease claim, and the disease is named in the title where Amazon’s scans read first.
Method and data
Listings enter the database through the same engine that runs our paid audits. Each listing is ruled, phrase by phrase, against all 109 standards in force at the scan, built on FDA structure/function rules, FTC substantiation guidance and Amazon’s supplement claims policy. Every finding must quote the page word for word, and any quote the software cannot find on the page is discarded before it enters published figures. Since 28 Sep 2026 the category also holds every ruled listing from Amazon’s own Best Sellers lists for it. Paid audit verdicts are signed by a licensed pharmacist. Individual brands are never named in public data. The full method and the standards behind it are documented on the Standards page.
The whole-database figures this report is drawn against are in The State of Supplement Claims; the category’s screenshot-ready numbers are on its scorecard.
The verdict split
A FAIL verdict means the listing carries at least one Critical or High finding, a phrase that breaks a published standard seriously enough that the listing as a whole does not pass. FIX THEN PASS means the only findings were Medium or Low. PASS means no findings at all.
Every ruled immune listing by verdict · 194 listings
6 of 194 listings pass with nothing to fix. A FAIL verdict does not mean the product is unsafe or ineffective; this report measures marketing language, not chemistry. But marketing language is what regulators, platforms and courts read, and by that measure 71% of the category’s bestsellers do not hold up.
Percentages rounded to the nearest point. Counts are exact.
Fail rate by category
Immune sits mid-table on fail rate and near the average on the share of brands carrying a Critical finding. What sets it apart is the pass count: 6 of 194.
The right-hand column is the share of that category’s brands carrying at least one Critical finding. Rows count every listing ruled in that category; a listing sold into two categories is ruled in each.
Fail means at least one Critical or High finding on the live listing.
The phrase table
Ranked by how many of the 109 brands carry each one. Struck phrases are quoted from live listings. The brands are not named. Their copy names them.
Counts are distinct brands, among the 109 ruled in the category, that carry the phrase or a direct variant. Bars are scaled to the top row.
Seven of the ten are the paperwork and default-vocabulary failures found across the whole database. The immune-specific rows are the category’s vocabulary: “boosts immunity” (33 brands), and two Critical rows, a disease term in the title or bullets (13) and “prevents” (8).
The claims that can end a listing
Every Critical finding in the category, grouped by the rule it breaks and counted by brand. Immune’s Critical claims are treatment verbs and disease terms, the class enforcement reaches first.
Counts are distinct brands with at least one Critical finding of that class. A brand can appear in more than one row.
Inside the findings
Across the 194 listings we logged 986 findings. 78 are Critical, 8% of the category’s findings against 9% across the database.
Every finding logged in the category, by severity · 986 findings
The dated record
The numbers above would matter less if enforcement were theoretical. It is not, and cold, flu and COVID claims are the ones regulators have acted on by name.
Four institutions with four different incentives read supplement listings the same way, and the platforms read with machines that keep getting better: Amazon’s AI scans billions of listing changes a day, and Google’s Gemini models read what an ad means. An immune listing that says “for colds and flu” is not hiding from any of them.
Sources: FTC penalty schedule and Notice of Penalty Offenses, FDA warning-letter database, Amazon seller policy, public litigation record.
Guidance
This is general information, not legal advice. The data does suggest a clear order of operations.
Retire “boosts immunity”.
At 33 of 109 brands, it is the category’s most common High claim after the missing disclaimer. “Supports normal immune function” and “helps maintain immune health” are the allowed forms.
Keep the disease out of the title first.
A condition word in the title or bullets is the most common Critical finding in the category, at 13 brands, and the title is the first thing Amazon’s scans read on every edit.
Never say prevent, relieve or “for colds”.
“Prevents” (8 brands), “relieves symptoms of” (6) and “for COVID, flu or colds” (6) are disease claims with an enforcement record.
Fix the paperwork.
The FDA disclaimer is missing at 56 brands, a Non-GMO claim has no document behind it at 59, “GMP certified” cannot be verified from the listing at 36, and at 6 brands a stated amount does not match the Supplement Facts panel.
Pharmacist-in-the-loop
Is your immune listing in this data?
Paste the listing and see its findings and its rank in the category, free. The audit answers in five business days: every claim, every channel, pharmacist signed.
Cite this report
Claims Verified, The State of Supplement Claims: Immune, Q3 2026
Free to reproduce with attribution. Every figure on this page is recomputed from the database before each release; the method and the standards are published and versioned.
audit@claimsverified.org →Media and methodology questions: audit@claimsverified.org · © 2026 Claims Verified · Data from the claims database, snapshot 27 Sep 2026 · Reproduction with attribution permitted · Cite as “Claims Verified, The State of Supplement Claims: Immune, Q3 2026” · Not legal advice
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