How We Rank Vendors
We don't test peptides. We test vendors — on whether they're willing to show you the receipts.
Our Vendor Transparency Score (A-E) is based entirely on independently verifiable signals. We don't license third-party testing data. We don't factor in affiliate relationships. Every signal we use can be checked by anyone with a web browser.
What we look at
Six criteria, weighted by how much they tell you about whether a vendor is actually testing their products:
How We Score Transparency
COAs PublishedHigh weightCertificates of Analysis visible on site with batch-specific results
Lab AccreditationHigh weightTesting lab is real, accredited, and independently verifiable
Batch TraceabilityHigh weightCOA batch numbers match product listings and packaging
Years in BusinessMedium weightWHOIS + incorporation records confirm operating history
Customer ResponseMedium weightResponds to inquiries within reasonable timeframe
Refund PolicyLow weightPublished refund/remake policy is accessible and clear
Methodology v2.1 · Last updated Mar 12, 2026Full methodology →
What we don't factor in
- Reddit/community sentiment. We read it. We reference it as flavor. But we never let anonymous forum posts move a score.
- Third-party testing data. We don't license data from testing services. Our scores are based on what vendors themselves publish and what we can independently verify.
- Affiliate status. Whether we earn commissions from a vendor has zero effect on their score. See our full affiliate disclosure.
Versioning
Our methodology is versioned. Every vendor profile shows which version was used to calculate their score and when it was last updated. When we change the methodology, we re-score all vendors and publish what changed.
Current version: v2.1 · Last updated: March 12, 2026