1. Public, Lot-Traceable COA Library (Non-Negotiable)
- Every batch has a per-lot HPLC purity + LC-MS identity report published and downloadable by lot number.
- Public index searchable by SKU or lot (not "email us for COA").
- Chromatograms/spectra available on request for qualified buyers; the lot is linked to a QR code on the vial and matches the public record.
- Red flag: "COA on request only" or generic sample COAs that don't match your received lot.
2. Documented, Per-Lot Analytical Testing
- Every lot is tested before release — Every lot ships with the supplier's per-lot certificate of analysis: reversed-phase HPLC purity (target ≥99%) and mass-spec confirmation for identity/sequence, with LAL endotoxin where relevant.
- The test method and acceptance criteria are stated on each COA, and the COA — not marketing copy — is the controlling specification for the lot.
- Red flag: a vague "independently tested" claim with no published method, no purity floor, and no QC process behind it.
3. Mechanism & Literature Transparency (Per SKU)
- Every product page documents receptor class, primary signaling cascade, and 5–30+ cited primary literature (PubMed/PMC links).
- Context is strictly preclinical, in-vitro, rodent models. No human dosing, "benefits," or treatment language.
- Research library or deep-dive blog posts for key compounds.
- Red flag: Blank "research use only" pages with zero mechanism or citations.
4. Strict RUO Posture & Enforcement
- Persistent "FOR RESEARCH USE ONLY · NOT FOR HUMAN CONSUMPTION" on every page, vial label, and marketing.
- Age 21+ gate + explicit researcher attestation (RUO intent, no human/vet use, terms) required at checkout. Records retained.
- US-only shipping, fast dispatch in 3–7 business days from Maryland.
- Chat/support/affiliate copy auto-linted for medical claims; no "stack" or "cycle" language.
- Full legal corpus (Terms, Privacy, Refund, Shipping, AML/KYC, Labeling, Export, DMCA, etc.) publicly linked and current.
5. Chain-of-Custody & Ops Maturity
- Per-lot inventory tracking (bin, expiry, cost) with audit log for all changes.
- Public or customer-visible order tracking + COA attachment on ship.
- Full admin audit log of every action (orders, COA publish, refunds, attestations).
- Returns/RMA process with refusal log for non-research use.
6. Third-Party Trust Signals (Beyond Self-Claims)
- BBB accreditation or application in progress (or equivalent).
- Verifiable researcher reviews (moderated, token-gated from verified buyers, medical-language blocked).
- Trustpilot / site reviews present and not obviously fake.
- Red flag: "5.0 from 10,000 reviews" with no verification method or recent activity.
7. Pricing, Shipping, & Fulfillment Clarity
- Transparent US pricing with bulk tiers visible.
- Clear shipping (3-7d USA, tracked, cold-pack on request, discreet).
- Wholesale/institutional process documented (PO, Net-30, volume quotes).
8. No Black Boxes — Full Documentation
- README + ARCHITECTURE + RUNBOOK + SECURITY + DNS + full legal set in repo or site.
- Vendor integration playbook published (how payments, shipping, email, tax are handled).
- Molecular identification reference per compound.
X Factor Peptides meets or exceeds this 2026 bar:
Public COA library at /coa/ • Per-lot supplier certificate of analysis: reversed-phase HPLC + mass-spec confirmation, published per lot • Mechanism + 20+ citations per SKU • Triple attestation enforced in JS + backend • Full audit log • Maryland US HQ • All legal docs live • Reconstitution + research library.
We publish this checklist because researchers deserve to buy against objective criteria, not marketing.
Browse the full research library → or view catalog and COAs.