Skip to content
SuppCheckrCheck the supplement before you buy.

Source Standards

Last updated: 2026-07-07 · Last reviewed: 2026-07-07

Overview

SuppCheckr builds reviews from publicly available label facts and credible sources. When a source gap exists, we document it rather than hiding it. Amazon customer reviews, retailer Q&A, influencer posts, forums, and unsourced claims are not used as primary editorial evidence.

Source quality tiers

  1. Official regulatory, government, and clinical reference sources — for example NIH Office of Dietary Supplements, FDA, FTC guidance, NSF, USP, Informed Sport/Choice, and official certification or database listings when applicable and citable.
  2. Official brand label and product pages — Supplement Facts images, ingredient statements, testing pages, and certificate-of-analysis references published by the brand.
  3. Retailer product pages — used when an official brand label page is unavailable, primarily for label images, SKU details, and dated price checks. Retailer marketing copy is treated cautiously.
  4. Brand marketing claims — noted when relevant but not treated as verified testing or label proof on their own.
  5. Sources not accepted as primary evidence — Amazon reviews, retailer customer reviews, influencer or social posts, forum comments, unsourced claims, and anecdotal testimonials.

Third-party testing evidence

Product pages show a testing status based on what public sources support at review time:

Verified
A credible third-party database, certificate, official program listing, or equivalent public source confirms the testing or certification for the relevant product, SKU, or documented scope. Verified does not mean FDA approval and does not guarantee suitability for everyone.
Claimed
The brand or seller says testing or certification exists, but SuppCheckr did not find a public verification source at review time.
Unknown / not claimed
No reliable public testing information was found, or the brand does not claim third-party testing.

Brand claims alone do not equal verified testing. Testing scope matters: SKU, batch, lot, product family, and certification program may differ. If verification is incomplete, SuppCheckr records the gap in the review rather than upgrading status without evidence.

Pricing sources

Prices are manually checked from public retailer or brand listings and recorded with access dates. SuppCheckr does not use live price feeds. A dated price supports value comparisons within a category (for example, price per 5 g creatine, per 100 mg elemental magnesium, or per 500 mg vitamin C) but may change after publication.

Recalls, formulation changes, and availability

SuppCheckr does not guarantee real-time monitoring of recalls, warnings, formulation changes, label changes, retailer availability, or pricing changes. Users should check the current product label and consult the manufacturer, retailer, or a qualified healthcare professional before purchasing or using a supplement.

Citations and fabricated references

Published content must not use fake, misleading, or unattributed source references. Medium- and high-risk factual or health-related claims require support from acceptable source tiers. When citations are unavailable, we use conservative language or document the uncertainty.

Conflicting or incomplete information

When label images, brand pages, and retailer listings disagree, SuppCheckr prioritizes the most direct label evidence available and notes conflicts in the review. When key facts cannot be confirmed, we say so explicitly rather than guessing.

Related pages

For how scores use these sources, see review methodology. To report a source or citation error, see corrections policy.