Research peptide retailer
XL Peptides
Nottingham-based research peptide retailer (Bio Research Ltd, since 2024). Bundles and stacks are the hero SKU (Wolverine BPC-157 + TB-500, Tesamorelin + Ipamorelin 3:1, KLOW, Glow). Janoshik third-party CoAs published per batch with QR-code verification. 10-vial bulk packs alongside singles. Wholesale tier above 11 vials.
Headline price
Wolverine Stack £29.99, BPC-157 single from £14.99
Regulated as
Bio Research Ltd 15464334, research-chemical supplier
Delivery area
UK-wide, 1 to 2 working days
Certificate of Analysis profile
Founded
2024
Companies House
15464334
Baseline last reviewed
2026-08-19
CoA library: https://xlpeptides.com/pages/testing
Re-checked on a rolling basis, not a fixed monthly cycle; see the last-verified date above. See methodology for how this is scored.
Separate from Testing Transparency
Responsible Practice assessment
Clear and responsibleNo specific concerns were recorded for XL Peptides against our responsible-brand framework at the time of review.
We assess what a brand publishes and makes available to customers, not its intentions. Full framework and what each status means: how we assess brands. Think this is wrong? Email hello@peptideclear.co.uk with evidence.
Not yet Independently Verified
The Testing Transparency and Responsible Practice results above are free and the same for every retailer. Nobody has commissioned the deeper Independent Verification process for XL Peptides yet. Request that it be run →
Named bundles and stacks
Best for
Researchers wanting named-stack bundles (Wolverine, KLOW, Glow) and CoAs that can be QR-verified to a named third-party lab.
Weak on
Newer trading history (2024). No blog or glossary content layer.
What stands out
- · Janoshik third-party CoAs per batch with dates
- · QR-code CoA verification on every product
- · Hero stacks: Wolverine, KLOW, Glow, Tesamorelin + Ipamorelin 3:1
- · 10-vial bulk packs alongside singles
- · 11+ vial tier triggers wholesale enquiry route
- · 18+ research-only consent gate on first visit
- · cGMP-compliant ISO9001 facility claim
Useful pages on XL Peptides
Our verdict
Best stack-led UK retailer with the strongest CoA verification mechanic (QR + Janoshik). The newest trading history of the segment is the only meaningful caveat.
Last reviewed 2026-08-19. PeptideClear earns nothing when readers click through, and this link carries no tracking. Editorial criteria are documented in our methodology.
Ready to start?
Visit XL Peptides →
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