Purity you can
verify. Science
you can trust.
Premium peptides for laboratory research — third-party tested for identity and purity, dispatched discreetly across the UK.
Third-party tested
Identity & purity verified
≥99% purity
Lab-grade, batch-traceable
Discreet packaging
Plain, unbranded outer
Fast UK dispatch
Tracked next-day options
Research peptides, batch-traceable and tested.
Every batch arrives with third-party analysis. Retatrutide is in stock now — the rest of the range is restocking as new testing clears.
Best sellerRetatrutide
4 sizes
Tirzepatide
2 sizes
BPC-157
10mg
TB-500
10mg
KPV
10mg
DSIP
5mg
Melanotan 1
10mg
Melanotan 2
10mg
GHK-Cu
100mg
KLOW 80
Research grade
Bacteriostatic Water
2 sizes
From sequence to sealed vial.
Synthesised
Produced to a defined amino-acid sequence by specialist manufacturers.
Independently tested
Third-party HPLC & mass-spec analysis — identity and purity, every batch.
Lyophilised & sealed
Freeze-dried, vialled and crimp-sealed in a controlled environment.
Dispatched discreetly
Stored cool, packed in plain unbranded outer packaging, shipped tracked.
0.0%
Purity
0%
Batch tested
We don't ask you to take purity on trust.
Research is only as reliable as the material behind it. That's why every Negra Peptides product is verified before it reaches your lab — and why you can ask for the paperwork to prove it.
Certificate of Analysis
Every batch is shipped against third-party HPLC and mass-spectrometry results you can request.
Identity & purity verified
We confirm the peptide is what the label says — and that it meets our ≥99% purity threshold.
Cold-chain handled
Lyophilised material stored cool and dispatched promptly to protect peptide integrity.
Lab-grade standards, documented.
Negra Peptides supplies compounds strictly for in-vitro laboratory research. We hold analysis on file for each batch and provide it on request, so your results stand on a verified foundation.
0.0%
Min. purity
0%
Batches tested
0h
Dispatch target
Third-party analysed
HPLC & mass-spec per batch.
Identity confirmed
Labelled compound, verified.
UK-based supply
Dispatched from within the UK.
For Research Use Only. Not for Human Consumption. Sold to qualified researchers aged 18+.
What researchers say
Top site
Great prices and product, seeing results straight away. I will definitely be using negra peptides again
— Steve Baxter · Tirzepatide
Fast delivery, and well packaged. I messaged ahead of buying for advice and all questions were answered quickly. Will definitely be buying again.
— Sara Burton · Tirzepatide
Ordered my first batch off reta from these guys after doing my own research, ordered Monday morning received my package on Tuesday. So excited to begin my weight loss journey. Thank you Negra
— Luke · Retatrutide
Questions, answered.
Still unsure about something? Drop us a message and we'll get back to you.
All Negra Peptides products are supplied strictly for in-vitro laboratory research and development. They are not approved for human or animal consumption, and nothing on this site is medical advice. By ordering you confirm you are a qualified researcher aged 18 or over.
Yes. Every batch is analysed by an independent third-party laboratory for identity and purity using HPLC and mass spectrometry. A Certificate of Analysis is held on file and available on request.
Orders are packed in plain, unbranded outer packaging for discretion and dispatched tracked from within the UK. Lyophilised material is handled to preserve peptide integrity in transit.
The full store launches with secure online checkout. This preview is to approve the design — once live, payment will be taken through the store's secure checkout at the final step.
Lyophilised peptides are best kept cool and dark; many researchers store them refrigerated or frozen. Reconstituted material should be refrigerated and used within its tested window. Always follow your own lab's protocols.
Questions, bulk enquiries or a CoA request?
Send us a message and we'll get back to you. Be the first to know when new peptides come back in stock.