Traceability
Batch-specific COAs
Reports should match a clearly identified current lot, not only a product name or example report.
Editorial methodology
Consistent review, visible limitations.
We document public evidence and procurement transparency using the same fields for every supplier. We do not assign an overall supplier score or ranking.
Download the verification checklistProvenance
Independent laboratory
The testing organization, report provenance, and a separate verification channel should be identifiable.
Coverage
HPLC and MS evidence
Purity and molecular identity are reviewed separately; one result is not treated as proof of every attribute.
Pricing
Price transparency
Unit size, displayed price, and common shipping charges should be visible at the checked date.
Business
Business transparency
Legal identity, fulfillment, support, refund, privacy, and marketing posture are reviewed.
Recency
Verification cadence
Prices, policies, lots, reports, and commercial relationships receive visible checked dates.
1. Capture
Preserve the page, report, lot identifiers, visible dates, price, shipping, policies, and the date reviewed.
2. Connect
Check whether the report can be connected to the offered lot and verified through a channel independent of the supplier page.
3. Limit
State what each method supports, what it does not establish, and which questions remain unresolved.
Evidence-state labels
Every claim needs a status.
Confirmed
Connected to a source record through an independent channel.
Reported
Stated by a supplier or laboratory but not independently connected.
Unresolved
The public record is insufficient to support or reject the claim.
Contradicted
Available records or claims materially disagree.
What the review does not prove
A documented evidence record is not a finding of safety, efficacy, legal status, sterility, suitability, or product authenticity. HPLC purity and mass-spectrometry identity do not establish unmeasured attributes. Supplier-selected samples also do not carry the same evidentiary weight as independently purchased and submitted samples.
Publication threshold
A supplier record is not published until we can preserve the source material, connect the documentation to a current offering, label unresolved claims, and record a verification date. Marketing language alone is not treated as verified evidence.
Affiliate independence
Commercial relationships do not change the evidence presented or the publication criteria. A supplier may be listed without an affiliate program, and an affiliate partner may be removed when documentation can no longer be verified. The reviewer records the relationship before reaching a conclusion.
Corrections and rechecks
Suppliers and readers can submit documented corrections. Material changes receive a new verification date rather than being silently rewritten. Current lots, reports, prices, policies, and relationships must be rechecked before publication.
Use the same worksheet we use.
Two printable pages: field checks plus a documented decision record.