Sourcing
How to choose a research peptide supplier
Quality varies widely between suppliers, and the label on a vial tells you very little. These are the six criteria that let you judge one objectively — and the red flags to walk away from.
For in vitro laboratory research only. Not for human or animal consumption; not intended to diagnose, treat, cure or prevent any condition. 18+.
Judge a supplier on evidence, not marketing. Every credible research peptide supplier can be assessed against the same six criteria — and the ones that matter most all come back to independent, verifiable, batch-level testing.
The six criteria
- 01
Independent third-party testing
The supplier should send samples to a named external laboratory, not rely on in-house claims. Look for HPLC purity and mass-spectrometry identity from a lab you can name.
Look for
A named lab (e.g. Janoshik) reporting HPLC purity + MS identity.
Walk away if
In-house or unnamed “testing”, or a purity figure with no lab behind it.
- 02
Batch-specific Certificates of Analysis
A COA is only meaningful when it corresponds to the exact batch you receive. Testing should be per batch, with a batch or task number that ties the report to the vial.
Look for
A COA that matches your batch, with a batch/task number.
Walk away if
One generic COA reused for every order, or no batch reference.
- 03
Results you can verify
The best suppliers let you confirm results on the testing laboratory’s own website — so you are trusting the lab, not a PDF the seller produced and could have edited.
Look for
A report reference or link that checks out on the lab’s own site.
Walk away if
A PDF only, with no independent way to confirm it.
- 04
A clear purity benchmark
Look for a stated minimum purity — commonly ≥99% — backed by a report and an identity check, not a vague marketing phrase.
Look for
A stated ≥99% benchmark, evidenced by a batch COA.
Walk away if
Vague “high purity” with no number and no report.
- 05
Transparency and reputation
A credible supplier is open about sourcing and testing, has genuine independent reviews, and is clear that products are for research use only.
Look for
Open sourcing/testing, real independent reviews (e.g. Trustpilot), research-use-only framing.
Walk away if
No verifiable reviews, hidden sourcing, or consumer-use framing for research chemicals.
- 06
Proper handling and dispatch
Products should be supplied lyophilised in sealed vials, with sensible storage guidance and reliable dispatch.
Look for
Lyophilised, sealed vials, clear storage guidance, reliable UK dispatch.
Walk away if
Poor packaging, no storage guidance, or unreliable fulfilment.
How BioHack London measures up
We built the range around these criteria: every batch is independently tested by Janoshik (HPLC purity + mass-spec identity) to a minimum 99% purity, with a batch-specific Certificate of Analysis you can verify at source. Our reputation is public on Trustpilot, and everything is supplied strictly for laboratory research.
Don’t take our word for it — read the independent reports, or learn how to read a Certificate of Analysis so you can judge any supplier for yourself.
Frequently asked questions
What makes a research peptide supplier trustworthy?
Evidence, not claims. A trustworthy supplier tests every batch at a named independent laboratory (HPLC for purity, mass spectrometry for identity), publishes batch-specific Certificates of Analysis you can verify at source, states a clear purity benchmark such as ≥99%, is transparent about sourcing, and supplies material properly (lyophilised, sealed, with storage guidance).
What purity should a research peptide supplier offer?
Look for a stated minimum of 99% purity, measured by HPLC and reported on a batch-specific Certificate of Analysis, alongside a mass-spectrometry identity confirmation. A purity number only means something when identity is confirmed and the report is from an independent lab you can check.
How can I verify a supplier’s test results?
Ask whether the Certificate of Analysis is batch-specific, which independent laboratory performed the test, and whether the result can be confirmed on that laboratory’s own website. If a supplier can only show a self-produced PDF with no independent lab named, treat any purity claim with caution.
Are BioHack London’s products for human use?
No. All products are supplied strictly for in vitro laboratory research purposes. They are not approved for human or veterinary use, are not for human consumption, and are not intended to diagnose, treat, cure or prevent any condition. Purchasers must be 18 or over.
Why does batch-specific testing matter?
Quality can vary between production runs. A COA tied to one batch tells you about the material you actually received; a generic or one-off report does not. Batch-specific testing with a batch or task number is the difference between a meaningful result and a marketing document.
Keep reading
Judge the supplier on evidence.
Every BioHack London batch is independently tested to ≥99% purity, with a Certificate of Analysis you can verify.