Buy Peptides UK. Lab-Tested, Batch-Certified Research Peptides.
Stocked and dispatched in the UK. Every vial carries a batch number that matches the certificate on its product page, and our Janoshik results can be checked on the lab's own website.
- Order by 3pm, dispatched same day
- Free UK delivery over £69
- Lost or damaged? Replaced free
Latest independent results
| Batch | Purity | Measured | Lab record |
|---|---|---|---|
| Ipamorelin 5mgUKPL-6540 · 21/09/2026 | 99.971% | 5.39mg | Verify Ipamorelin 5mg on janoshik.com |
| SS-31 10mgUKPL-8613 · 10/09/2026 | 99.846% | 11.68mg | Verify SS-31 10mg on janoshik.com |
| Glutathione 1500mgUKPL-2195 · 21/09/2026 | 99.119% | 1597.31mg | Verify Glutathione 1500mg on janoshik.com |
Most-bought research peptides
Direct links to our most-requested research compounds.








43 research compounds, UK in-stock
What every certificate tells you
Testing is done by independent laboratories, never in-house. Each certificate is tied to one batch, and that batch number is printed on the vial.
- 1
Purity by RP-HPLC
Liquid chromatography measures what share of the sample is the target peptide, reported to three decimal places on Janoshik reports.
On this certificate:99.971%
- 2
Content per vial
Where the lab measures it, the certificate shows the actual milligrams found in the vial against the amount on the label.
On this certificate:5.39 mg found, 5 mg on the label
- 3
Checkable at the source
Janoshik results carry a test number and key, so you can open the original report on janoshik.com rather than trusting our copy.
On this certificate:Janoshik test #229871
A UK peptide supplier built on verification
UK Peptide Lab is a UK-based supplier of research-grade peptides, built around a simple principle: researchers should be able to verify exactly what is in the vial before they place an order. Each batch is tested by an independent laboratory, mainly Janoshik Analytical and Marfleet Analytical, with purity measured by RP-HPLC, and the Certificate of Analysis is published openly on the product page rather than held back behind a support request.
Because everything is stocked and dispatched from within the United Kingdom, orders placed before 3pm on a working day leave the same afternoon by Royal Mail Tracked 24. Published testing, UK stock and tracked delivery are the things worth checking in any supplier, and they are all visible before you order.
You can read the full story behind UK Peptide Lab, or see how every batch is tested and documented before it is released for sale.

PT-141 10mg
UKPL-5217 · 99.939%

SS-31 10mg
UKPL-8613 · 99.846%

Kisspeptin-10 10mg
UKPL-3784 · 99.225%

Glutathione 1500mg
UKPL-2195 · 99.119%
- Batches currently in stock, with purity by RP-HPLC from Janoshik Analytical.
Can I buy peptides in the UK?
Yes. Research peptides are legal to purchase in the UK for laboratory research purposes. They are not licensed medicines and are not intended for human or veterinary use. By placing an order you confirm you are aged 18 or over and that products will be used solely for research purposes.
Are your peptides high quality and lab-tested?
Product pages link to batch-matched certificates. Check each certificate for the testing laboratory, method and result: some report chromatographic purity, while others, such as NAD+, report measured content instead. Where a Janoshik verification link is available, you can check the lab's original result there. All products are for in-vitro research only.
Is it legal to buy research peptides in the UK?
Research peptides are legal to purchase in the UK for in-vitro laboratory research. They are not approved medicines and are not sold for personal, human, or veterinary use. Buyers must be aged 18 or over and agree to research-use-only terms at checkout.
Who can order from UK Peptide Lab?
We supply UK academic institutions, private laboratories, and qualified independent researchers. All buyers must be aged 18 or over and accept our research-use-only terms at checkout. We do not sell for personal, recreational, or therapeutic use.
How fast will my order arrive?
Orders placed before 3pm UK time on a working day are dispatched the same day by Royal Mail Tracked 24, which usually arrives in 1 to 2 working days. UK shipping is free on orders over £69. Peptides ship as lyophilised powder in sealed vials, which is stable at room temperature for the few days it spends in transit.
A registered UK company.
UK Peptide Lab operates under company no. 17157816, VAT GB523581496. Both are checkable on the public register.
Payments we never see.
Card details go into our payment provider's encrypted form with 3D Secure, and Open Banking payments are approved inside your own banking app.
Lost, damaged or wrong? Replaced free.
Tell us within 48 hours with your order number and a replacement goes out at our cost. No return needed.
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