Where we send people. And why.
Sourcing is where most people get burned. So we built a standard and held every source to it. The criteria below are the test a supplier has to clear. Only the few that pass make the list. No hype, no favours, just the bar.
50+Suppliers reviewed
26Assessed in depth
FewOnly the few that pass are listed
Seven criteria. Every one, every time.
A source earns a place here by clearing all seven. Anything less, and it does not make the list. This is the test, in full.
- 01
Independent, per-batch CoA
A certificate of analysis from a named third-party lab, run on the batch you receive. Not in-house testing, not a reused generic document.
- 02
HPLC purity stated
Purity reported by high-performance liquid chromatography, ideally 98 to 99 per cent or higher, with the chromatogram shown.
- 03
Mass spectrometry identity
Confirmation by mass spectrometry that the compound in the vial is what the label claims.
- 04
Endotoxin and sterility testing
For injectables, endotoxin testing at minimum, and ideally sterility testing.
- 05
Lot number matches the vial
The lot or batch number on the CoA matches the number printed on the vial in hand.
- 06
Transparent business
A real contact route, a stated returns policy, and sensible payment options.
- 07
Independent corroboration
Outside confirmation where it exists: an independent Finnrick grade, or a test we have commissioned ourselves.
Any one of these, and a source is off the list.
- ×Any FDA warning letter or enforcement action.
- ×In-house-only testing, or a missing CoA.
- ×No lot number match between the CoA and the vial.
- ×Prices far below the going market rate.
- ×Hype or urgency selling with no supporting data.
Before you read further
Read this first.
Educational only
This content is for educational purposes only. These compounds are intended for research use. Nothing here is medical advice.
Do your own research
These listings are assessments of public information, not endorsements. Verify a current per-batch CoA yourself before any purchase.
Status changes
Testing standards, business terms, and legality all change over time. The date we last re-checked each entry is shown on its card.
Regulatory
The research-use category is under active FDA and CBP enforcement. Legality varies by jurisdiction. Know the rules where you are.
The list
Sources that cleared the bar.
Each card shows the criteria the source passed, a link to its testing evidence, the lab that ran it, where independent corroboration stands, and the date we last re-checked it.
These listings rest on each vendor's own published per-batch CoAs, read against our criteria. Independent testing that we commission ourselves is a later layer we are still building, not something in place today.
Peptide Partners
The most independently verified source on the list. It publishes separate per-batch certificates for purity, identity, endotoxin, heavy metals, and sterility, run by multiple independent labs (TrustPointe and Kovera) and each verifiable on the lab's own site, plus an independent purchase-and-test track record.
Criteria passed
- ✓Independent, per-batch CoA
- ✓HPLC purity stated
- ✓Mass spectrometry identity
- ✓Endotoxin and sterility testing
- ✓Lot number matches the vial
- ✓Transparent business
- ✓Independent corroboration
- Testing lab
- TrustPointe and Kovera
- Corroboration
- Finnrick A to C across 74 tests
- Last re-checked
- 2026-06-04
Real Peptides
Our longest-standing source. Every batch ships with a certificate of analysis from Freedom Diagnostics, shown on each product page and in its CoA library, covering HPLC purity at or above 99 per cent, identity, and endotoxin below 0.1 EU per mg. US-finished under ISO-certified conditions.
Criteria passed
- ✓Independent, per-batch CoA
- ✓HPLC purity stated
- ✓Mass spectrometry identity
- ✓Endotoxin and sterility testing
- ✓Lot number matches the vial
- ✓Transparent business
- Independent corroborationnot shown
- Testing lab
- Freedom Diagnostics
- Corroboration
- Not yet independently re-tested
- Last re-checked
- 2026-06-04
Synthesis Peptides
The most complete documentation of our current sources: full analytical panel including endotoxin and sterility. Testing by Freedom Diagnostics. Not yet independently re-tested by a second lab.
Criteria passed
- ✓Independent, per-batch CoA
- ✓HPLC purity stated
- ✓Mass spectrometry identity
- ✓Endotoxin and sterility testing
- ✓Lot number matches the vial
- ✓Transparent business
- Independent corroborationnot shown
- Testing lab
- Freedom Diagnostics
- Corroboration
- Not yet independently re-tested
- Last re-checked
- 2026-06-03
BioInfinity Lab
A US supplier tested by Verum Analytics in Basel, Switzerland, with every batch certificate hosted on the lab's own site rather than re-uploaded, so each result is independently verifiable. The panel covers HPLC purity at or above 99 per cent, mass spectrometry identity, and endotoxin below 0.5 EU per mg. The only source here using a lab other than Freedom Diagnostics, which adds independent-lab diversity to the list.
Criteria passed
- ✓Independent, per-batch CoA
- ✓HPLC purity stated
- ✓Mass spectrometry identity
- ✓Endotoxin and sterility testing
- ✓Lot number matches the vial
- ✓Transparent business
- Independent corroborationnot shown
- Testing lab
- Verum Analytics
- Corroboration
- Not yet independently re-tested
- Last re-checked
- 2026-06-04
Nurapeptide
Per-batch purity and identity verified by Freedom Diagnostics. Endotoxin and sterility not published, so request them for injectable use.
Criteria passed
- ✓Independent, per-batch CoA
- ✓HPLC purity stated
- ✓Mass spectrometry identity
- Endotoxin and sterility testingnot shown
- ✓Lot number matches the vial
- ✓Transparent business
- Independent corroborationnot shown
- Testing lab
- Freedom Diagnostics
- Corroboration
- Not yet independently re-tested
- Last re-checked
- 2026-06-03
More sources are being added, including one we plan to put through independent corroboration. The short list grows as each candidate clears the criteria.
