# Our Verification Process – Research Vials > Why this page existsA peptide-research catalog is only as credible as its verification process. This page documents how a vial of material moves from a sup... ## Why this page exists A peptide-research catalog is only as credible as its verification process. This page documents how a vial of material moves from a supplier’s manufacturing line to the shelf at Research Vials, what gets checked at each step, what causes a rejection, and what is on file when a customer asks. The same pipeline applies to every product in the catalog — the only thing that varies from molecule to molecule is the specific identity check at the analytical step. ## Step 1 — Supplier vetting We source from a small set of vetted peptide manufacturers. A new supplier is not added without a sample run that passes our acceptance threshold (defined below), and a supplier is not retained if their lot-to-lot variability widens past the threshold over time. Our current supplier line uses the **YPB** batch prefix, which is the convention you will see on every COA in our catalog (YPB.212, YPB.265, etc.). The number after the prefix identifies the specific synthesis batch.We read this document first — it tells us what to expect at the independent verification step and flags any obvious failures before we incur the cost of a separate analytical run. A lot whose supplier COA already fails any of our acceptance criteria does not advance to Step 3. It is returned or rejected. ## Step 3 — Independent third-party verification Lots that pass Step 2 are then sampled for an independent analytical run at **Analytical Formulations, Inc.**, a US-based peptide testing laboratory. This is the structural element that separates verified-research-grade material from a generic resale operation.The verification report has authority to reject a lot before it lists, and that authority is exercised — see Step 5.0% by peak area on the named compound’s elution peak - Mass within ±0.5 Da of the calculated [M+H]+ - For bridged peptides, the bridged-to-linear ratio ≥ 99:1 on the chromatogram - For copper peptides, peptide-to-copper stoichiometry within 0.95-1.05 - No coeluting impurity above 1.0% on the chromatogram A lot that misses any of these does not list, regardless of what the supplier’s COA says. ## Step 5 — Rejection record We have rejected lots in 2026 across multiple molecules: - GHRP-6 / SS-31 / Ipamorelin: lots rejected on racemization or non-natural-residue purity grounds - AOD-9604: lots rejected on bridged/linear mixture (chain pure on summary, but bridge form mixed on chromatogram) - MOTS-c: lot rejected on methionine sulfoxide presence above threshold - GHK-Cu: lot rejected on copper stoichiometry — peptide chain was clean, the metal was not stoichiometric These rejections are part of what the verification step pays for. The cost is real; the alternative is selling material that does not match its specification. ## Step 6 — Listing and batch documentation Lots that pass Step 4 are listed on the catalog with the active batch ID visible on the product page and the third-party COA available as a downloadable PDF. When a new batch comes online, the previous batch IDs remain visible on the product page for as long as the older inventory is in circulation; once that inventory is sold through, the page reflects only the current batch. ## Step 7 — Cold-chain shipping We ship inside the United States in insulated mailers with frozen gel packs. The lyophilized form of most peptides we list tolerates short thermal excursions, but we ship cold because some customers reconstitute on receipt and the reconstituted form does not tolerate the same range. Tracking is provided on every order; sign-on-delivery is available on request. ## Step 8 — Batch retention and post-sale verification We retain a small sample of each shipped batch on file for the duration of that batch’s lifespan in the catalog. If a customer reports a quality concern on a specific lot, we can pull the retained sample for re-analysis at Analytical Formulations, Inc., and we will do so without a fee for the customer. ## Step 9 — Customer COA access and questions Every customer can request the COA for the specific lot they received via the [contact page](/contact-us/). If you have a question about reconstitution, storage, stability behavior, or anything else not covered by the product page, the Research Vials Lab Team is the routing path. Quality-related contacts take precedence over routine inquiries. ## What this process does not cover This page describes our verification, handling, and distribution process. It does not constitute medical advice, dosing guidance, or recommendations for use in any human or veterinary context. The materials we ship are for research use only. If you are evaluating these materials for any other use case, that decision and its consequences are not within our process or our scope. --- Source: https://researchvials.com/our-verification-process/