Peptide Vendor Transparency Scorecard

"Is this vendor legit?" is not a vibe, it is a paper trail. Tick off the signals a supplier actually gives you and this scores it 0 to 100, weighted so the checks that are hard to fake count the most. It rewards what you can verify, not what a site claims.

Research use only. This scores a vendor on transparency signals for handling research materials. It is not medical advice, not a dosing tool, and not a guarantee about any product. Nothing is saved or sent anywhere; the score lives only in your browser.

0/100

Low transparency

Tick the signals this vendor actually gives you. The verifiable ones (a lot-matched, independently checkable third-party COA) carry the most weight.

The published scoring rubric

This is the full rubric the scorecard runs on, printed in advance so you can audit it rather than trust it. The twelve signals below carry fixed weights totalling 100 points, and the weights deliberately favour signals that are objectively verifiable by a third party over signals a vendor can simply claim about itself. Nothing here is a dosing or health judgement; it scores paperwork and verifiability only.

Transparency signals and their fixed point weights
Signal	Weight	Why it is hard to fake / how to check it
Ships each vial with a third-party Certificate of Analysis (COA)	15	A report from an outside lab is the baseline. An in-house-only "COA" is a self-graded test.
The report is independently verifiable by accession or QR code on the lab's own site	15	A PDF can be edited in minutes; a code that resolves on the lab’s public portal cannot be faked.
The COA names a specific, real independent lab	12	A named lab you can look up (for example Janoshik or Freedom Diagnostics) beats an unnamed "third-party lab".
The lot or batch on the COA matches the lot printed on your vial	12	Purity is batch-specific. A COA for a different lot proves nothing about the vial in your hand.
The report shows both HPLC purity and mass-spec identity	10	HPLC shows how pure it is; mass spec confirms it is actually the right molecule. You want both.
You can read the COA before you pay, not "emailed after purchase"	8	Verification you can only do after paying is not leverage. It should be public before the sale.
Purity figures look realistic (about 98 to 99.x%), not a flawless 100% on everything	6	A report where every value is perfect is a red flag, not a reassurance.
Third-party testing covers the specific SKU you are buying	6	One tested "hero" product does not vouch for the rest of the catalog.
The vendor has a real, findable business identity	5	A reachable address, working support, and an aged domain are weak signals, but their absence is a strong one.
Transparent about net peptide content or salt form	5	NPC and salt form change how much actual peptide you get. Hiding them hides the real cost per mg.
Accepts normal card payment, not crypto or gift-card only	4	Crypto-or-gift-card-only removes buyer recourse. Not disqualifying, but it is a signal.
Ships domestically rather than a mystery international parcel	2	A convenience and accountability signal, not a purity one. Weighted lightly on purpose.
Maximum possible score	100	All twelve signals present and independently confirmable.

Score bands and what each one means
Score	Tier	What it means
80 - 100	High transparency	This vendor exposes the checks that matter. You can independently verify identity and purity before you buy, which is the whole point.
50 - 79	Medium transparency	Some real signals, but gaps remain. Fill the missing checks, above all a lot-matched, independently verifiable third-party COA, before trusting it with money.
0 - 49	Low transparency	The verifiable signals are mostly absent. Treat purity and identity claims as unproven until you can independently confirm them yourself.

How to read the score

The weights are not equal on purpose. A vendor earns most of its score from signals that are objectively hard to fake: a third-party report you can pull up yourself by accession, tied to the exact lot on your vial, showing both HPLC purity and mass-spec identity. Marketing polish, star ratings, and "pharmaceutical grade" stickers score nothing here because none of them can be independently checked.

Use the score to compare, not to bless. A high score means the vendor exposes the checks that matter, so you can confirm identity and purity before you pay; a low score means those checks are mostly missing, so treat any purity claim as unproven. Then go do the actual checks: learn how to read a COA, verify one yourself by accession, and the red flags that should drop a score fast.

Disclosure: coaindex is a Pepora affiliate and earns a commission on code VET15. Pepora is scored on the same published criteria as every other supplier in our vendor table at /vendors, where it currently does not rank first.

Score a vendor on these signals, then score Pepora on the same ones.

Pepora publishes independently verifiable third-party COAs (Freedom Diagnostics, HPLC plus mass spec) you can look up by accession before you buy, on lot codes that match the vial. It scores on the checks that carry the most weight here, and it ships from the US. Third-party testing currently covers a handful of SKUs and is being expanded across the catalog, so check the exact product before you pay.

See Pepora's verifiable COAs

Use code VET15 for 15% off