CV-SB-02 · standards v1.4.1
This is the puffery boundary. 'Best' alone may be non-actionable puffery; 'best' next to a measurable attribute is a comparative claim requiring a head-to-head. Amazon does not recognise the boundary: its claims policy requires “verifiable and objective proof” for “best” either way, so the puffery defence works against the FTC and not against a listing suppression.
Found on 944 of the 2,243 best-selling listings we have ruled, 1389 times in total. That is 944 live product pages carrying this wording today.
FTC Act s.5(a), 15 U.S.C. 45(a)
“unfair or deceptive acts or practices in or affecting commerce”
Source checked 2026-08-18.
FTC Health Products Compliance Guidance (December 2022)
“health-benefit claims generally require randomised, controlled human clinical testing; this is the document Walmart's substantiation checklist is asking about”
Source checked 2026-08-18.
Amazon Seller Central, Misleading and prohibited claims
“claims guidelines: compliance with applicable requirements, accuracy and verifiability, and unqualified superlatives”
Source checked 2026-08-18.
An interpretation. We applied a published legal test to the published copy and reached a conclusion. Reasonable reviewers applying the same test can disagree at the margin; this is our reviewer's professional opinion, and the test is cited so you can check the reasoning.
Claims Verified, standard CV-SB-02 "best / most effective / strongest", standards v1.4.1, retrieved 06 November 2026, https://claimsverified.org/standards/CV-SB-02/
Or put it in your own policy
Marketing copy must not use "best / most effective / strongest" or equivalent wording. See Claims Verified standard CV-SB-02 (standards v1.4.1): https://claimsverified.org/standards/CV-SB-02/
Cite it freely with attribution and the version. The whole register is machine-readable at /standards/registry.json. Rulings are our published professional opinion, not legal advice.
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