# Supplement Testing Evidence Index

Canonical: https://supplementexplained.com/quality/supplement-testing-evidence-index/
Last modified: 2026-09-04T16:56:14+00:00
Indexing: noindex, follow. This markdown file is a machine-readable alternate of the canonical HTML page.
Publisher: Supplement Explained
Review model: Editorial evidence review, not medical review unless explicitly stated on the canonical page.

Supplement Testing Evidence Index This index shows the named public quality or testing signal found during each Supplement Explained product review. It distinguishes a visible product-level certification, public certificate, or testing statement from cases where no named public product signal was found. It does not rank brands, reproduce laboratory testing, or turn a missing public record into proof that no testing occurred. How to read this index Named public signal: the reviewed source set contained a named certification, testing statement, or public certificate route. No named public signal found: our review did not identify one in the checked sources. This is not proof that the manufacturer performs no testing. Review basis: explains whether the product page is label-based or includes a stronger original proof layer. Checked date: follows the corresponding product page's current modified date so stale records are visible. What different proof types can show Proof typeWhat it can supportWhat it does not prove Brand testing statementA stated process or policy at brand levelThat the exact SKU or lot passed a specific public test Facility or GMP registrationManufacturing-system controls and inspections within a stated scopeClinical effectiveness or a clean result for every finished lot Product certification directoryThat the named product appears in the certifier's current programThat every other product from the brand has the same status Lot-specific COA or reportResults and methods reported for the identified lotThat another lot or differently named SKU has identical results Clinical studyAn outcome under the study's population, dose, comparator, and designThat a retail product is identical to the intervention or works for everyone Method and maintenance rules We start with the exact product page and visible Supplement Facts or label details. We look for a named certification, certifier directory, public certificate, or clearly scoped testing statement. We record the narrowest defensible label. A facility claim is not promoted to a finished-product certification. We preserve “not found” as uncertainty, not a negative accusation. When a product page is updated, its date and evidence row update together from the live WordPress record. Read how to verify a third-party tested claim, USP vs NSF, and How We Review Evidence before comparing unlike proof types. Limits you should not overlook The index is a discovery aid, not a regulatory database or product recall system. A seal can apply to a facility, process, product, batch, ingredient, sport-screening program, or another narrow scope. Public certificate access can expire, move, or require a lot number printed on the bottle. Testing for identity or contaminants does not prove that a supplement will deliver a health outcome. Product names and sizes can look similar while using different formulas, directions, or certification status. Use the index with these decision pages Product directoryBrowse product analysesCompare label, value, safety, proof, and review basis. Testing literacyUnderstand lab evidenceLearn what tests and biomarkers can and cannot show. Quality routeCheck labels and claimsUse practical checklists before trusting a seal or slogan. Primary verification directories NSF dietary supplement listings USP Verified Products Nutrasource certified-products directory Informed Choice certified-products search Informed Sport certified-products search Index launch review: September 4, 2026. Individual product rows inherit their own checked date.