What we look for, supplier by supplier.
PEPVERA is an aggregator. We do not run our own lab and we do not test vials ourselves. What we do is read each supplier's published evidence and surface it side by side so a buyer can compare. Below is the checklist we apply against a supplier's own documentation before they appear on the storefront, plus the patterns we drop suppliers for. Use the supplier profile to see which suppliers meet which lines.
Purity (HPLC)
High-pressure liquid chromatography separates the peptide from impurities. We do not print a purity percentage we have not independently verified — instead, each supplier profile states that supplier's COA policy: publishes a public sample COA, verifies in-house, or sends the COA with the shipment. Read the COA, then buy.
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. A mismatch is the cleanest evidence in a return dispute with the supplier.
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.
Policy: each supplier's COA policy is shown on its profile and COA page, so buyers can check how purity is documented before they buy — we never print a purity number we have not verified.
- Red flag 02Mock or recycled COA
PDFs that look like Janoshik or Vanguard certificates but the batch ID does not match the vial. Lab partner logos copied from public marketing assets. Same COA reused across multiple batches.
Policy: each supplier listing links to a sample COA on the supplier's own published page. See /coa.
- 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.
Policy: suppliers without a published COA path get the most-defensive 'shipment-only' framing on the COA page.
- 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.
Policy: priced listings below market median trigger a manual review before we surface them to customers.
- 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.
Policy: suppliers whose stated return terms do not cover damaged-on-arrival do not pass our intake review.
- 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.
What we surface: each supplier profile lists whether they print a vial-side batch ID. Suppliers that strip it are flagged on the profile so buyers can choose.
- 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.
Policy: suppliers listed on PEPVERA must have at least one durable contact channel beyond Telegram.
- 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.
Policy: our own copy stays research-only and we expect the same of suppliers we link.
Lyophilized peptides are stable at room temperature for short transit. Reconstituted peptides require refrigeration. Until activated by bacteriostatic water, the vial tolerates the journey. Cold-chain practice varies supplier by supplier. Use the supplier profile to compare insulation, gel-pack rating, and freight choice before buying.
- · Best practice: vacuum-sealed insulated mailer with a frozen gel pack rated for 96 hours at outside-temperature equilibrium. Some suppliers ship this way; others do not.
- · Best practice: express freight for any depot-to-customer leg over 4 days. Confirm the supplier's stated transit window matches.
- · On arrival, refrigerate immediately if the gel pack is no longer cold. Do not reconstitute and freeze.
- · If a vial arrives broken or warm, photograph the package and contact the supplier within 24 hours. Replacement terms are set by each supplier and listed on their profile.