How we vet every supplier.
Every supplier on PEPVERA goes through the same 4-point batch test and 8-point sourcing audit. Below is the full checklist.
Purity (HPLC)
High-pressure liquid chromatography separates the peptide from impurities. Our floor is 99.0%. Anything below is rejected — never reaches the catalog.
Identity (mass spec)
Mass spectrometry confirms the molecule by mass-to-charge ratio. HPLC tells you how pure. Mass spec tells you what it actually is.
Sterility + endotoxin
LAL test and bacterial culture. Required for anything injected, even research.
Vial ↔ batch ↔ certificate
The vial label carries a batch ID. That ID opens one specific test certificate. If any of these don't match, the order is refundable on the spot.
Patterns we drop a supplier on. Each entry corresponds to a disqualifier inside the PEPVERA supplier audit. If you are sourcing on your own, the same checklist applies.
- Red flag 01Underdosed vials
5 mg labeled, 3 mg in the vial. The most common defect across the research peptide market — and the most expensive for buyers, since dose-finding cycles assume the label is honest.
PEPVERA verdict — Every batch tested at 99%+ before listing
- Red flag 02Mock or recycled COA
PDFs that look like Janoshik or Cayman certificates but the batch ID does not match the vial. Lab partner logos copied from public marketing assets. Same COA reused across multiple batches.
PEPVERA verdict — Batch ID ↔ vial label ↔ COA URL must triangulate
- Red flag 03“100% pure” without lab
No HPLC chromatogram. No mass spec. No endotoxin number. Just marketing copy. If the supplier cannot show you the assay, the assay does not exist.
PEPVERA verdict — No lab partner = not listed
- Red flag 04Pricing that beats the floor
Per-mg prices below the bulk China-direct floor are a tell. Either the molecule is short, the vial is light, or the COA is fiction. Math has limits.
PEPVERA verdict — Outliers below market median trigger sample audit
- Red flag 05Storage and shipping shortcuts
No cold-chain insulation. No gel pack. Lyophilized peptide tolerates short transit, but a supplier that does not bother is a supplier that cuts corners elsewhere.
PEPVERA verdict — Insulated mailer + gel pack mandatory
- Red flag 06Aggressive blind packaging without batch ID
Blind shipping is a feature. Blind shipping that erases the batch ID from the vial is a defect — it removes the buyer's only path to verification.
PEPVERA verdict — Batch ID printed on the vial, always
- Red flag 07“Customer service” by Telegram only
A supplier that operates exclusively through ephemeral messaging — no email, no website, no fixed identity — is structurally unaccountable. Refund disputes vanish with the channel.
PEPVERA verdict — At least one durable contact channel required
- Red flag 08“Research-only” theatre but pharmaceutical claims
Disclaimers on the footer, dosing protocols on the product page. The legal posture and the marketing posture must match — or the supplier is selling on both sides of a line they cannot defend.
PEPVERA verdict — Research-only language enforced site-wide
Lyophilized peptides are stable at room temperature for short transit. Reconstituted peptides require refrigeration. Until activated by bacteriostatic water, the vial tolerates the journey.
- — Vacuum-sealed insulated mailer with a frozen gel pack rated for 96 hours at outside-temperature equilibrium.
- — Express freight for any depot-to-customer leg over 4 days.
- — On arrival, refrigerate immediately if the gel pack is no longer cold. Do not reconstitute and freeze.
- — If a vial arrives broken, photographed and warm — full replacement, no return required.