The State of Supplement Claims · Category report
We ruled the 187 best-selling cognitive listings on Amazon US, from 116 brands, against all 109 published standards. 78% fail, and only 3 listings pass with nothing to fix, among the lowest pass counts of the eight categories. Nootropics sell on mechanism and proof, and both fail: “blocks” or “inhibits” a biological process at 14 brands, “studies show” with no citation at 23. Where it turns Critical, a listing names a prescription drug or promises no side effects. 34 of the 116 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
Four in five cognitive listings fail, and almost none pass clean.
146 of the 187 listings received a FAIL verdict, 78% against 76% across all eight categories. 3 listings pass with nothing to fix. These are the bestsellers: nootropic stacks, lion’s mane, omega-3 and focus formulas.
It fails on mechanism and proof, not on disease names.
29% of cognitive brands carry a Critical finding, below the 42% average. What fails the category is the vocabulary of pharmacology: “blocks” or “inhibits” a process at 14 brands, “normalizes” or “restores” at 17, “studies show” with nothing cited at 23, and “boosts immunity” drifting in from another category at 23.
Where it turns Critical, it names a disease or a drug.
The Critical claims in cognitive are the most expensive kind: Alzheimer’s, dementia or memory loss named at 8 brands, a prescription drug named or implied as an equivalent at 4, “no side effects” at 7, and listing amounts that do not match the Supplement Facts panel at 7, which Amazon’s policy treats as a listing error on its own.
A nootropic is sold as a mechanism: it blocks this, inhibits that, works like the pill it is compared to. Each of those is a drug claim to a regulator, and the comparison to a named drug is the claim the platforms’ AI flags 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 cognitive listing by verdict · 187 listings
3 of 187 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 78% of the category’s bestsellers do not hold up.
Percentages rounded to the nearest point. Counts are exact.
Fail rate by category
Cognitive is third on fail rate and below the average on the share of brands carrying a Critical finding. It is the category where nearly every listing has something serious to fix and almost nothing is clean: 3 passes in 187.
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 116 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 116 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 cognitive-specific rows are mechanism claims: “blocks” or “inhibits” a biological process (14 brands) and “normalizes” or “restores” (17) describe pharmacology, not nutrition. “Studies show” with no citation (23) is a proof claim the FTC treats as unsubstantiated as written.
The claims that can end a listing
Every Critical finding in the category, grouped by the rule it breaks and counted by brand. Cognitive produces few Critical findings, but the ones it produces are drug comparisons, safety promises and label mismatches.
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 187 listings we logged 927 findings. 59 are Critical, 6% of the category’s findings against 9% across the database. Cognitive fails on the weight of High findings: 272 of them.
Every finding logged in the category, by severity · 927 findings
The dated record
The numbers above would matter less if enforcement were theoretical. It is not, and drug comparisons are the claims it reaches first.
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. A listing that compares itself to a named drug 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.
Never name the drug.
“Like Adderall”, “natural alternative to” and a prescription name in the backend keywords are drug-equivalence claims, at 4 brands here. Amazon’s policy names them outright. There is no compliant version of that sentence.
Describe support, not mechanism.
“Blocks”, “inhibits”, “normalizes” and “restores” describe what a drug does to a process, at 14 and 17 brands. “Supports memory and focus” and “helps maintain mental clarity” are the structure/function forms.
Cite the study or cut the sentence.
“Studies show” with nothing cited is on 23 listings. Name the study, the dose it used and the population, or say less.
Never promise safety.
“No side effects” and “100% safe” are Critical at 7 brands. Delete the sentence; it adds nothing a shopper needs.
Fix the paperwork.
The FDA disclaimer is missing at 65 brands, a Non-GMO claim has no document behind it at 61, “GMP certified” cannot be verified from the listing at 46, and at 7 brands a stated amount does not match the Supplement Facts panel.
Pharmacist-in-the-loop
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Cite this report
Claims Verified, The State of Supplement Claims: Cognitive, 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: Cognitive, Q3 2026” · Not legal advice
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