Compare UK prices. 40+ products · 195 retailers reviewed & tracked, 159 scored
PeptideClear UK

PeptideClear Trust Index

195 UK peptide retailers, 159 scored on Certificate of Analysis transparency

Oliver Mackman · Editorial director · Best Business Loans Ltd (16833937)

Last reviewed: 2026-08-19

This page looks at three separate things about each retailer: how transparent they are about lab testing (Testing Transparency, the CoA score below), whether we can establish who's actually behind the business (Business Transparency, shown in the table), and whether their overall online presentation is clear and responsible (Responsible Practice further down). A retailer can score well on one and poorly on another. These are separate signals, and we never blend them into one number.

A Certificate of Analysis (CoA) is a lab document showing what's actually in a batch, confirming purity and identity through independent testing: a retailer publishing real, checkable CoAs lets you verify what you're buying instead of just taking their word for it (full explainer). We identified 195 UK retailers; 159 could be assessed and are scored across six observable signals: per-batch publishing, gating method, named third-party lab, QR-verifiable lookup, dedicated CoA URL, and public stance on third-party testing. The remaining 36 could not be assessed at all and are excluded from scoring rather than marked red: not being able to check is a different fact from failing a check. Full methodology, tier thresholds and last-verified dates are below the table. Want to check a certificate yourself rather than take our score on trust? Here's how, step by step.

How we score

We apply the same published checklist to every UK research-peptide seller we can find. Sellers don't apply to be included, and nobody can pay for a better score.

We look at whether a seller publishes

  • · a Certificate of Analysis for every batch, not just once for the product line
  • · the certificate somewhere you can see it before buying, without giving an email address
  • · the name of the third-party lab that did the testing
  • · a way to check the certificate against the lab's own records, not just a PDF anyone could edit
  • · a dedicated page or archive for its CoAs, not certificates scattered across product listings
  • · a clear public position on third-party testing, rather than staying silent on it or rejecting it

That produces the score above, A to F. It's deliberately narrow: a high score means a seller is transparent about its testing. It is not PeptideClear vouching for the products themselves, and it says nothing about safety.

For retailers: if our research finds something that looks significant, we contact you before it publishes. You get the chance to give evidence, context or a correction, and we weigh that before anything goes live.

26

CoA: strong

Per-batch publishing, third-party lab named, no email gate or open subdomain.

58

CoA: partial

Some signal (per-batch claim or gated CoA), but gaps on transparency, lab naming, or accessibility.

67

CoA: weak / closed

No accessible CoA, no publicly identifiable third-party testing, or a registered entity that showed as dissolved at the time of review.

8

Needs re-confirmation

Not a tier and not necessarily a bad sign: a specific signal in our research needs independent re-confirmation before we're willing to publish a verdict.

Jump straight to the full table

Full comparison

Ascend Peptides UK
CoA: strong A+ 6 signals checked
Verified 2026-08-19 54 checks, 8 areas
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Confirmed
Last verified
2026-08-19
Full signals →
Astra Labs
CoA: strong A+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Bio Hack London
CoA: strong A+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Confirmed
Last verified
2026-08-10
Generally responsible, with room for improvement
Full signals →
My Reta
CoA: strong A+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Peak Peptide EU / Peak Research Co
CoA: strong A+ 6 signals checked
Access
Open
Lab partner
Liquilabs s.r.o.
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Peptology Labs
CoA: strong A+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
Regenix Peptides
CoA: strong A+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 1 conduct flag Clear and responsible
Full signals →
RETA UK
CoA: strong A+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Simply Peptides
CoA: strong A+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 2 conduct flags Clear and responsible
Full signals →
Verified Peptides
CoA: strong A+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
XL Peptides
CoA: strong A 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Confirmed
Last verified
2026-08-14
Clear and responsible
Full signals →
Bio Peptides UK
CoA: strong A- 6 signals checked
Access
Open
Lab partner
Analiza Białekverify a certificate →
Business Transparency
Confirmed
Last verified
2026-08-10
Generally responsible, with room for improvement
Full signals →
Peptide Systems
CoA: strong A- 6 signals checked
Access
Open
Lab partner
ARL Bio Pharma
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Peptides UK 4U
CoA: strong A- 6 signals checked
Access
Open
Lab partner
Analiza Białekverify a certificate →
Business Transparency
Confirmed
Last verified
2026-08-13
Full signals →
Pepturion
CoA: strong A- 6 signals checked
Access
Photo in listing
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Reta Research
CoA: strong A- 6 signals checked
Access
Photo in listing
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
UK Peptide Lab
CoA: strong A- 6 signals checked
Access
Open
Lab partner
Chromate Analytics
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
BuyRetaUK
CoA: strong A- 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Crown Peptides
CoA: strong A- 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
Full signals →
Essential Peptides
CoA: strong A- 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
Full signals →
Lucid Peptides
CoA: strong A- 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
Full signals →
Peptiology
CoA: strong A- 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Power Peptides
CoA: strong A- 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-10
Generally responsible, with room for improvement
Full signals →
Pure Peptides UK
CoA: strong A- 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-05-18
Clear and responsible
Full signals →
The Peptide Code
CoA: strong A- 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-10
Clear and responsible
Full signals →
The Peptide Company
CoA: strong A- 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Beyond Peptides
CoA: partial Conduct flag on file B+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 2 conduct flags
Full signals →
Phoenix Biolabs
CoA: partial Conduct flag on file B+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not established
Last verified
2026-08-10
⚠ 2 conduct flags Generally responsible, with room for improvement
Full signals →
Prime Peptides
CoA: partial Conduct flag on file B+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
Biohack Peptides
CoA: partial Conduct flag on file B+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not established
Last verified
2026-08-10
⚠ 2 conduct flags Material concerns
Full signals →
BioLabs Peptides / BioFlex Peptides
CoA: partial CoA photographed, not downloadable B+ 6 signals checked
Access
Photo in listing
Lab partner
Freedom Diagnostics
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 2 conduct flags
Full signals →
Kensington Labs
CoA: partial Conduct flag on file B+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not established
Last verified
2026-08-10
⚠ 1 conduct flag Material concerns
Full signals →
Peptide Works
CoA: partial Conduct flag on file B+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 2 conduct flags
Full signals →
Peptora Labs
CoA: partial Not independently verifiable B+ 6 signals checked
Access
Open
Lab partner
Elementrix Laboratories
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
UK SARMs
CoA: partial Not independently verifiable B+ 6 signals checked
Access
Open
Lab partner
MZ Bio Labs, Colmaric Analyticals
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
NXT Gen Peptides
CoA: partial Lab not named B+ 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
Particle Peptides
CoA: partial Lab not named B+ 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
Alpha Peptides
CoA: partial Not independently verifiable B+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 3 conduct flags Clear and responsible
Full signals →
Benchmark Peptides
CoA: partial Not independently verifiable B+ 6 signals checked
Access
Photo in listing
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Confirmed
Last verified
2026-08-13
Full signals →
Genetic Research
CoA: partial Not independently verifiable B+ 6 signals checked
Access
Open
Lab partner
Analiza Białekverify a certificate →
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 3 conduct flags Clear and responsible
Full signals →
Imperial Peptides
CoA: partial Lab not named B+ 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-05-18
Clear and responsible
Full signals →
PharmaLabGlobal UK
CoA: partial Not independently verifiable B+ 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 3 conduct flags
Full signals →
Pioneer Research Peptides
CoA: partial Lab not named B+ 6 signals checked
Access
With order
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
Full signals →
Pure Lab Peptides
CoA: partial Lab not named B+ 6 signals checked
Access
With order
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
Tide Labs
CoA: partial Lab not named B+ 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-05-18
⚠ 1 conduct flag Generally responsible, with room for improvement
Full signals →
Union Biolabs
CoA: partial Not independently verifiable B+ 6 signals checked
Access
With order
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not established
Last verified
2026-08-10
⚠ 3 conduct flags Material concerns
Full signals →
Alphamino
CoA: partial Not independently verifiable B 6 signals checked
Access
Photo in listing
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Blue Peak Peptides
CoA: partial Not independently verifiable B 6 signals checked
Access
Email request
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not established
Last verified
2026-08-10
⚠ 1 conduct flag Generally responsible, with room for improvement
Full signals →
Bluewell Peptides
CoA: partial Lab not named B 6 signals checked
Access
With order
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-06-03
Generally responsible, with room for improvement
Full signals →
Chroma Peptides
CoA: partial Lab not named B 6 signals checked
Access
With order
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-06-03
Clear and responsible
Full signals →
LeoLab
CoA: partial Lab not named B 6 signals checked
Access
Photo in listing
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 2 conduct flags
Full signals →
Midshire Labs
CoA: partial Lab not named B 6 signals checked
Access
Photo in listing
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
OP Labs
CoA: partial Lab not named B 6 signals checked
Access
With order
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-06-03
Clear and responsible
Full signals →
Peak Research Co
CoA: partial Lab not named B 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
Peptides UK
CoA: partial Lab not named B 6 signals checked
Access
On-site form
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-05-18
⚠ 1 conduct flag Unclear
Full signals →
Proforma Peptides
CoA: partial No public CoA access B 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-07-14
⚠ 1 conduct flag Generally responsible, with room for improvement
Full signals →
Regen Labs
CoA: partial No public CoA access B 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-07-14
Clear and responsible
Full signals →
Thoroughbred Labs
CoA: partial Lab not named B 6 signals checked
Access
With order
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-06-03
⚠ 1 conduct flag Clear and responsible
Full signals →
Vionex Peptides
CoA: partial Lab not named B 6 signals checked
Access
Photo in listing
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 1 conduct flag Material concerns
Full signals →
Wild Ginger Peptides
CoA: partial Lab not named B 6 signals checked
Access
With order
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-10
⚠ 1 conduct flag Clear and responsible
Full signals →
Amino Peptides
CoA: partial Lab not named B- 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
Astra Peptides / Astra Labs Research
CoA: partial Not independently verifiable B- 6 signals checked
Access
On request
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
BioLab Peptides
CoA: partial Lab not named B- 6 signals checked
Access
Email request
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-08-10
⚠ 4 conduct flags Generally responsible, with room for improvement
Full signals →
Dr Peptides
CoA: partial Lab not named B- 6 signals checked
Access
Photo in listing
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-05-18
Material concerns
Full signals →
Global Peptides
CoA: partial Lab not named B- 6 signals checked
Access
Email request
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-08-10
⚠ 1 conduct flag Generally responsible, with room for improvement
Full signals →
Natty Peptides
CoA: partial No public CoA access B- 6 signals checked
Access
Undisclosed
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 2 conduct flags Material concerns
Full signals →
Neovia Peptides
CoA: partial Not independently verifiable B- 6 signals checked
Access
Photo in listing
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Confirmed
Last verified
2026-08-13
Full signals →
Peptide Lab UK (EU)
CoA: partial Lab not named B- 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
R&D Peptides
CoA: partial Lab not named B- 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-10
⚠ 1 conduct flag Generally responsible, with room for improvement
Full signals →
Reta Supplier
CoA: partial Lab not named B- 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 3 conduct flags
Full signals →
BioPlex Peptides
CoA: partial No public CoA access C 6 signals checked
Access
Undisclosed
Lab partner
Vanguard Laboratory
Business Transparency
Confirmed
Last verified
2026-08-18
⚠ 2 conduct flags Clear and responsible
Full signals →
Buy Retatrutide
CoA: partial Lab not named C 6 signals checked
Access
Photo in listing
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-08-10
⚠ 2 conduct flags Generally responsible, with room for improvement
Full signals →
my-peptides
CoA: partial Lab not named C 6 signals checked
Access
Email request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-05-10
Generally responsible, with room for improvement
Full signals →
New Wave Peptides
CoA: partial Lab not named C 6 signals checked
Access
Email request
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-07-14
⚠ 1 conduct flag Generally responsible, with room for improvement
Full signals →
Peak Peptides
CoA: partial Lab not named C 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Peptide Labs UK
CoA: partial Lab not named C 6 signals checked
Access
Email request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-05-18
Material concerns
Full signals →
Peptide Supply UK
CoA: partial Lab not named C 6 signals checked
Access
With order
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Peptides of London
CoA: partial Lab not named C 6 signals checked
Access
Photo in listing
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-10
⚠ 2 conduct flags Generally responsible, with room for improvement
Full signals →
Premier Peptides
CoA: partial Lab not named C 6 signals checked
Access
Photo in listing
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
Prestige Peptides
CoA: partial Not independently verifiable C 6 signals checked
Access
On request
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Pro Peptides Plus
CoA: partial Lab not named C 6 signals checked
Access
Photo in listing
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-08-10
⚠ 3 conduct flags Material concerns
Full signals →
Research Peptide
CoA: partial Lab not named C 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 2 conduct flags
Full signals →
Retatrutide UK
CoA: partial Lab not named C 6 signals checked
Access
Email request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
UK Peptides (.is)
CoA: partial Lab not named C 6 signals checked
Access
With order
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Apex Biolab
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
BIOLABS
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 3 conduct flags
Full signals →
Black Country Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
Full signals →
Bodylab
CoA: weak / closed Lab not named D 6 signals checked
Access
Photo in listing
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-08-10
⚠ 3 conduct flags Clear and responsible
Full signals →
Bonafide Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-08-10
⚠ 5 conduct flags Material concerns
Full signals →
C&D Peptides
CoA: weak / closed Lab not named D 6 signals checked
Access
Unverified
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-10
Material concerns
Full signals →
CK Peptides
CoA: weak / closed Not independently verifiable D 6 signals checked
Access
On request
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Not yet checked
Last verified
2026-06-03
⚠ 1 conduct flag Generally responsible, with room for improvement
Full signals →
DN Lab Research
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 3 conduct flags
Full signals →
DTS Pharmacy / Global Pen Peptide
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
Elevate Peptides UK
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
Full signals →
Euro-Gen Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
Fusion X Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
⚠ 2 conduct flags
Full signals →
Future Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
Full signals →
GH Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
HCS Pharma
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 3 conduct flags
Full signals →
Just SARMS
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 2 conduct flags
Full signals →
Labgrade Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-08-10
⚠ 1 conduct flag Unclear
Full signals →
LeoLabs UK / LeoLab UK
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
MuscleChem
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 2 conduct flags
Full signals →
Nexus Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
Full signals →
Nupex
CoA: weak / closed Lab not named D 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 2 conduct flags Clear and responsible
Full signals →
NXT Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
Opti Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
⚠ 2 conduct flags
Full signals →
Peptide Barn
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
PeptideLabUK
CoA: weak / closed Lab not named D 6 signals checked
Access
Email request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Peptides Clinic
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 1 conduct flag Material concerns
Full signals →
Peptides Pharmacy
CoA: weak / closed Lab not named D 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 2 conduct flags
Full signals →
Precision Peptides
CoA: weak / closed Not independently verifiable D 6 signals checked
Access
On request
Lab partner
Analiza Białekverify a certificate →
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 3 conduct flags Material concerns
Full signals →
Raccoon Peptides
CoA: weak / closed Lab not named D 6 signals checked
Access
Unverified
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 2 conduct flags Material concerns
Full signals →
RAW Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
Full signals →
Revive Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
Revive Peptides EU
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Sculpt Peptide
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-08-10
⚠ 2 conduct flags Material concerns
Full signals →
Surrey Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
Sussex Peptides / East Sussex Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
Full signals →
Tested Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-08-10
⚠ 1 conduct flag Unclear
Full signals →
The Peptide Lab UK
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 2 conduct flags
Full signals →
The Peptides Outlet
CoA: weak / closed Lab not named D 6 signals checked
Access
Photo in listing
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 2 conduct flags
Full signals →
Trident Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-08-10
⚠ 2 conduct flags Material concerns
Full signals →
Tru Form Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
UK Peptide Store
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
UK Peptide Supply
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
UK Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Rejects testing
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-05-18
Unclear
Full signals →
UK-Peptide
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 2 conduct flags
Full signals →
Vitality Peptides UK (.uk)
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Wholesale Peptides
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-10
⚠ 1 conduct flag Generally responsible, with room for improvement
Full signals →
Anglo Peptides
CoA: weak / closed Lab not named D 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-06-03
Clear and responsible
Full signals →
Aura Peptides
CoA: weak / closed Lab not named D 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-08-10
⚠ 1 conduct flag Generally responsible, with room for improvement
Full signals →
Bio Pulse Labs
CoA: weak / closed Lab not named D 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
BIOLAB Shop
CoA: weak / closed Lab not named D 6 signals checked
Access
Unverified
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-05-20
⚠ 5 conduct flags Unclear
Full signals →
British Peptides
CoA: weak / closed Lab not named D 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
BuyReta
CoA: weak / closed Lab not named D 6 signals checked
Access
Unverified
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-08-10
⚠ 3 conduct flags Material concerns
Full signals →
Direct Peptides UK
CoA: weak / closed Lab not named D 6 signals checked
Access
Unverified
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-05-18
⚠ 4 conduct flags Unclear
Full signals →
Direct Sarms
CoA: weak / closed Lab not named D 6 signals checked
Access
Unverified
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-05-10
⚠ 2 conduct flags Generally responsible, with room for improvement
Full signals →
Maxx Labs
CoA: weak / closed Lab not named D 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-06-03
⚠ 1 conduct flag Generally responsible, with room for improvement
Full signals →
Nova Peptide
CoA: weak / closed Lab not named D 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-08-10
⚠ 1 conduct flag Clear and responsible
Full signals →
Peptagenix
CoA: weak / closed Lab not named D 6 signals checked
Access
Unverified
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-05-18
⚠ 3 conduct flags Generally responsible, with room for improvement
Full signals →
Peptide Supplies
CoA: weak / closed Lab not named D 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-08-10
⚠ 2 conduct flags Generally responsible, with room for improvement
Full signals →
Precision Research UK
CoA: weak / closed Lab not named D 6 signals checked
Access
Email request
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 2 conduct flags Clear and responsible
Full signals →
Pretty Peptide
CoA: weak / closed Lab not named D 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not established
Last verified
2026-08-10
⚠ 2 conduct flags Generally responsible, with room for improvement
Full signals →
ProLab Peptides
CoA: weak / closed Lab not named D 6 signals checked
Access
Unverified
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-10
⚠ 2 conduct flags Generally responsible, with room for improvement
Full signals →
Receptor Chems
CoA: weak / closed Lab not named D 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Synergetics
CoA: weak / closed Lab not named D 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
TrimFast
CoA: weak / closed Lab not named D 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
UK Peptides (ukpeptides.com)
CoA: weak / closed Lab not named D 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-08-13
Full signals →
Ultra Peptides
CoA: weak / closed Lab not named D 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-13
⚠ 1 conduct flag
Full signals →
Research Peptides UK
CoA: weak / closed No public CoA access D 6 signals checked
Access
Undisclosed
Lab partner
Not named
Business Transparency
Not yet checked
Last verified
2026-05-18
⚠ 1 conduct flag Material concerns
Full signals →
RP Peptides
In-depth review needed Lab not named 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 1 conduct flag Generally responsible, with room for improvement
Full signals →
Adonis Elite Peptides
In-depth review needed Lab not named 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 1 conduct flag Clear and responsible
Full signals →
Bionik Peptides
In-depth review needed Not independently verifiable 6 signals checked
Access
Unverified
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 3 conduct flags Clear and responsible
Full signals →
CoreLabs Peptides
In-depth review needed Lab not named 6 signals checked
Access
Unverified
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 1 conduct flag Clear and responsible
Full signals →
Platinum Peptides
In-depth review needed Lab not named 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 2 conduct flags Material concerns
Full signals →
GB Peptides
In-depth review needed Lab not named 6 signals checked
Access
On request
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 1 conduct flag Material concerns
Full signals →
Peptides 4U
In-depth review needed Conduct flag on file 6 signals checked
Access
Open
Lab partner
Janoshik Analyticalverify a certificate →
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 1 conduct flag Material concerns
Full signals →
Elixer Peptides
In-depth review needed Lab not named 6 signals checked
Access
Open
Lab partner
Not named
Business Transparency
Confirmed
Last verified
2026-08-10
⚠ 1 conduct flag Generally responsible, with room for improvement
Full signals →

Per-batch publishing, QR verifiability, founded year and Companies House number for each retailer are on its own page, linked above, along with the full CSV/JSON download referenced in methodology.

Think we've got this wrong? Every score is mechanical, but the research behind it is done by people, and people miss things. Spot an error, an out-of-date signal, or a gap? Tell us: it's worked as a correction, not a complaint.

Email [email protected]

Independence

We are paid nothing by anyone on this page

PeptideClear takes no commission, referral fee or payment from any of the 159 retailers scored here. The links out are ordinary links with no tracking attached, and we earn nothing whether you use them or not.

We are saying this at the ranking rather than in a footer because it is the obvious objection to everything above, and you are entitled to weigh it. Until July 2026 the objection had force: the site did operate affiliate arrangements, and two of the retailers scored on this page were among them. We removed all of it.

The score was already mechanical before that change and still is: six observable signals applied identically to every retailer, with every input published in the table above and downloadable as CSV and JSON. Nobody here can move a tier by hand. If you disagree with one, recompute it from our data and show us where we are wrong.

What we earn from this page

Nothing

No commission, no referral fee, no listing fee, no paid placement, and no arrangement under which a retailer could ask for a tier to be reconsidered.

That also means no retailer here is a customer of ours, so there is nobody to lose by publishing a red tier. 67 of the 159 are red.

The full position, including what removing the revenue costs us: how we are funded.

Identified, not scored

36 more UK sellers we know about but haven't scored

These aren't a seventh tier and they don't carry a score or letter grade. A CoA tier requires real certificate-of-analysis findings, and we haven't gathered those for these sellers yet, so scoring them anyway, even at the bottom, would assert a verdict we don't have evidence for. Not being able to check yet is a different fact from failing a check.

UA · Too new to vet yet 0 sellers Show list +

Registered UK companies with a named director and Companies House number confirmed, but under 12 months of trading, not enough for a fair CoA review. We re-review each at the 12-month mark. UA is "unavailable," not a grade: it doesn't sit on the A+ to F scale used for scored retailers, on purpose, so a company being young is never shown as if it were a bad score.

UA · Insufficient data to vet 36 sellers Show list +

No identifiable UK trading entity yet, site unreachable or blocked to us at the time of review, or too little published to assess. Re-checked on a rolling basis. UA is "unavailable," not a grade, same reasoning as above: absence of data is not evidence of a bad seller, so it can't share a colour or scale with a genuine red "weak/closed" score. Full registry with the specific reason for each: dead and unreachable sellers.

UA Apex Peptide

UA Arma Peptides

UA Biolab Shop UK

UA Clarity Peptides

UA CMSR Labs

UA D&L Peptides

Companies House 16977255

UA Futureproof Peptides

Companies House 16917118

UA Great British Peptides

UA Ideal Labz

UA Medlab Peptides

Companies House 17212658

UA Meridian Peptides

UA NASS Peptides

Companies House 16990556

UA Pen Peptide UK

UA Pendragon Peptides

Companies House 16842079

UA Peptex Labs

UA Peptide Shop

UA Peptide Shop

UA Peptune Labs

UA Pulse Peptides

UA Receptor Chem

UA Regen Peptides

UA Retapeptide

UA Retatrutid UK / Synedica

UA Rhythm Peptides

UA RK Peptides

Companies House 16985172

UA SARMs Shop UK

UA Sterling Peptides

UA Steroids-UK (peptides range)

UA Supreme Peptides

Companies House 17293926

UA The Peptide Source

UA Tide Labs UK

UA UK Peptides Shop

UA UK Peptology

UA Vital Peptides

UA Vitality Peptides

UA Viva Peptides

Research-only integrity

Does the seller behave like the research supplier it says it is

On 2026-08-14 we visited all 159 retailers and recorded four things that have nothing to do with certificates and everything to do with whether a seller's conduct matches its own research-only claim. These are the same conditions a payment acquirer applies before it will underwrite a peptide merchant. They are shown as flags and are deliberately not folded into the CoA score, because the published rubric is six observable CoA signals and quietly adding inputs would silently change every score we have ever published.

29

sell peptides in capsule or tablet form, which is oral dosing by design

54

publish benefit claims next to products despite research-only framing

152

publish a research-use-only disclaimer somewhere on the site

123

carry that disclaimer inside individual product listings, not just the footer

Observed by loading each retailer's own site and its product pages. Where a signal could not be observed it is recorded as unknown rather than as a failure, and 134 of the 159 could not be fully observed. A seller can satisfy all four and still sell a poor product. These say something narrower: whether the research-only framing is real or decorative.

The verdict on each retailer, in one line

The same information as the table, written out as a sentence per retailer, so a verdict can be read, quoted or cited without decoding a grid. The reason given is the single most load-bearing signal behind that score.

How this is scored, in brief

Six observable CoA signals, applied identically to every retailer: per-batch publishing, gating method, a named third-party lab, QR verifiability, a dedicated CoA URL, and public stance on third-party testing. Shown out of 100 for readability. Green at 70+, amber 30 to 69, red below 30. A dissolved Companies House entity auto-reds regardless of score, and a UK-facing storefront we searched for and could not find on Companies House is capped below green regardless of score (status checked at time of review; readers should verify current registration directly at Companies House).

"Needs re-confirmation" is not a seventh tier. It means a specific finding is serious enough to disclose but not yet certain enough to stand behind as a verdict. It can withhold a tier; it can never lower a score. These retailers still appear in the table above with the unresolved signal named.

"Not yet checked" is not a mark against a retailer. It means we haven't looked, not that we looked and found nothing. Any retailer can ask us to check for free at any time, evidence emailed to the address below, or commission Independent Verification for the full paid check. Either way, what we actually find sets the result, in whichever direction that goes.

Full scoring detail: methodology. Funding position: how we are funded. Every material change to this index, dated: changelog. Think a finding here is wrong or out of date? Email [email protected] with evidence: corrected within 5 working days, dated correction note for material changes (editorial policy). Nobody can buy a tier change; anyone can correct one with evidence.

Separate from the CoA score

Responsible Practice: is this retailer clear, upfront and not misleading?

A retailer can have excellent Certificate of Analysis practice and still be unclear about who operates the business, contradict its own policies, or make claims its product pages can't support. The CoA score above measures one thing on purpose. This measures something different: whether the retailer's overall online presentation reflects a genuine effort to be clear, fair and transparent.

What we expect from a responsible brand

A brand selling a product online should aim to be clear, fair and transparent in everything it communicates. Claims should be accurate, evidence-based and presented in a way that an ordinary customer can understand, without exaggeration, ambiguity or important information being hidden.

Customers should be able to understand what the product is, what it does, what it does not do, who it is intended for, what it costs, and any material limitations or risks before making a decision.

Marketing should inform rather than manipulate. Comparisons should be fair, reviews and endorsements should be genuine and appropriately disclosed, and the overall presentation should not create an impression that the underlying facts cannot support.

Where a product is regulated, medical, health-related, safety-critical or otherwise carries a higher potential risk to the customer, we expect a correspondingly higher standard. Claims should reflect the strength of the available evidence, appropriate warnings and limitations should be prominent, and regulatory requirements should be followed. A responsible brand should take particular care not to overstate benefits, minimise risks, imply approvals or assurances that do not exist, or encourage customers to make decisions based on incomplete or misleading information.

The greater the potential harm if a customer is misled, the higher the standard of evidence, clarity, transparency and caution we expect.

Put simply: be clear about what you sell, be honest about what it can and cannot do, provide appropriate evidence for the claims you make, be upfront about material risks and limitations, and never rely on confusion, omission or exaggeration to make the sale.

How we assess brands

We assess what a brand actually publishes and makes available to customers. We do not claim to know a company's intentions. Our assessment reflects the evidence we can observe.

1. Clear and responsible

The brand appears to make a genuine and consistent effort to communicate clearly, fairly and responsibly. Important claims are appropriately qualified and supported, material risks and limitations are visible, and customers are given the information they need to make an informed decision. Where the product is regulated or higher-risk, the brand demonstrates the additional care, evidence and caution we would expect.

2. Generally responsible, with room for improvement

The brand appears to be trying to communicate responsibly and provide appropriate information, but there are gaps, weaknesses or areas where greater clarity, evidence, disclosure or caution would improve the customer experience. These issues do not currently prevent us from seeing an overall effort to act responsibly.

3. Unclear

There is not enough evidence for us to determine whether the brand is taking a consistently responsible approach. Important information may be missing, difficult to verify, inconsistently presented or insufficiently clear. This does not necessarily mean the brand is acting irresponsibly; it means we cannot confidently conclude from the available evidence that it meets the standard we would expect.

4. Material concerns

The brand's online presentation shows significant departures from what we would expect from a responsible seller, particularly given the nature or potential risk of the product. This may include unsupported or potentially misleading claims, inadequate risk information, important omissions, unverifiable evidence, inappropriate certainty, misleading presentation, or other practices that could leave customers with a materially inaccurate impression of the product.

A Material concerns assessment does not require us to determine why the brand has presented its products in this way. It reflects what we can observe and the potential effect that presentation could have on customers.

Assessed on the same evidence-and-correction basis as the CoA score: nobody can buy a better assessment, and a specific reason is recorded for every retailer, visible on its own page. Think an assessment is wrong? Email [email protected] with evidence.

Beyond the free score

Want a specific retailer independently verified in depth?

The CoA tier and Responsible Practice status above are free and the same for everyone. Independent Verification is a paid tier on top: lab accreditation checks, batch traceability, corporate and regulatory history, and a right-of-reply process where we put findings to the retailer before publishing them. It never changes the free score, only adds published evidence on top of it.

See what Independent Verification covers →

Not listed here?

Request a free first audit

We email you the verdict link when the audit is complete.

What are you vetting?

We commit to an editorial verdict within 72 hours. PeptideClear is independent. We do not guarantee a specific outcome. See our methodology and privacy policy.

Named UK manufacturers we reference

Real UK peptide manufacturing happens under MHRA inspection at named facilities. The three we cite across PeptideClear editorial as the reference point for "named lab":

  • · Almac Group (Craigavon, Northern Ireland): MHRA-inspected, 600+ pharma customers, named launches Agios Pyrukynd, Sanofi Tzield, PTC Upstaza.
  • · Sterling Pharma Solutions (Cramlington, Northumberland): UK CDMO, 25+ years peptide synthesis, 40-amino-acid capability.
  • · Biosynth Pepceuticals (Leicester): MHRA-approved API manufacturer, 8 cGMP labs, multi-kilogram commercial supply.

None sells to consumers. They are the contrast point for what real UK peptide manufacturing looks like. Read the full explainer.

Why this matters

Every UK research peptide retailer claims purity. A small minority publish per-batch Certificates of Analysis from a named third-party laboratory. That is one of the few objective signals a buyer can verify independently before buying.

This page exists because no UK retailer can honestly compare its own CoA practice against the rest of the segment. We do that here, in one place, re-checked on a rolling basis.

Research peptide encyclopaedia entries

CoA quality matters most when a compound has a substantial research literature. These are the compounds with the most-cited UK retailer stock and preclinical literature.

BPC-157

Most discussed research peptide. Animal data only. Encyclopedia entry.

TB-500

Thymosin beta-4 fragment. Preclinical connective tissue literature.

GHK-Cu

Copper-binding tripeptide. In-vitro and preclinical literature. Also in cosmetics.

Ipamorelin

Growth hormone secretagogue. Novo Nordisk Phase II, discontinued.

Sermorelin

GHRH analogue. Geref withdrawn US 2008. No UK marketing authorisation.

MOTS-c

Mitochondrial-derived peptide. Nature Communications 2020. Mouse data.

Full research peptides encyclopaedia

Machine-readable access

The data behind this index is published as a read-only Data API and MCP server for developers and AI agents: a JSON endpoint listing every seller with its CoA verification signals, plus an aggregate CoA snapshot. Factual vendor and verification data only, not medical advice and not a recommendation to use any substance. Released under CC BY 4.0.

Cite this index

To reference this index, please credit PeptideClear and link to this page:

Source: PeptideClear, UK Research Peptide Retailer CoA Trust Index, https://peptideclear.co.uk/coa-trust-index/ (accessed 14 July 2026). DOI: https://doi.org/10.5281/zenodo.21354701

This index is archived with a permanent DOI: 10.5281/zenodo.21354701. Download the observable-signals snapshot: CoA Trust Index, July 2026 edition (CSV).

Think we've got this wrong? Every score is mechanical, but the research behind it is done by people, and people miss things. Spot an error, an out-of-date signal, or a gap? Tell us: it's worked as a correction, not a complaint. Nobody can pay to change a tier, and material corrections are made within 5 working days with a dated note on the affected retailer's page: full process in our editorial policy.

Email [email protected]

Our live data trackers

PeptideClear maintains these as refreshable datasets rather than one-off articles. Each carries its own source, methodology and last-updated date.

Live data tracker

UK GLP-1 prescribing tracker →

Monthly NHS England primary-care prescribing volumes for GLP-1 medications, rebuilt as each new month publishes. Dated chart, month-by-month table, full methodology.

Source: NHSBSA English Prescribing Dataset

Live data tracker

UK peptide clinical-trials tracker →

Registered interventional trials for every research peptide we track, by phase and recruitment status, linking through to each compound record.

Source: ClinicalTrials.gov and ISRCTN

Live data tracker

MHRA enforcement and safety tracker →

Every MHRA safety alert, enforcement action and drug safety update relevant to weight-loss medicines and peptides, dated and linked to the gov.uk original.

Source: gov.uk / MHRA

Live data tracker

UK peptide regulation: monthly overview →

A monthly record combining the MHRA feed with a web-search pass for ASA rulings, Trading Standards action and named-retailer enforcement, each item linked to its source.

Source: gov.uk / MHRA / ASA / Trading Standards

Live data tracker

UK research-peptide price index →

Headline price per milligram across the UK research-peptide retailers we score, so a price can be read against the market rather than in isolation.

Source: PeptideClear retailer survey

Live data tracker

Data API and MCP server →

Read-only, no-auth REST API and MCP server over the full scored dataset: corporate identity, regulatory status, CoA verification signals. CC BY 4.0.

Source: PeptideClear, live data

Check it yourself: the official sources

PeptideClear is editorial. Nothing here replaces the regulator, and you should not take our word for any of it. These are the official UK destinations where the underlying position is published, free to read and open to anyone.

  • legislation.gov.uk

    Human Medicines Regulations 2012

    The legislation that defines what counts as a medicine in the UK, and what constitutes illegal supply. A product marketed with medicinal claims is regulated as a medicine regardless of how it is labelled.

  • World Anti-Doping Agency

    WADA Prohibited List

    The annually updated list of substances and methods banned in sport. Many research peptides sit under S0 or S2. UK Anti-Doping enforces it on tested athletes.

  • MHRA

    Report a fake or illegally supplied medicine

    The MHRA route for reporting a website or seller supplying medicines illegally, and for reporting a product you believe is counterfeit.

  • MHRA

    Yellow Card scheme

    Report a suspected side effect, a defective medicine, or a fake or counterfeit product. Anyone can report, including patients. Reports feed the MHRA safety monitoring system.

  • MHRA

    MHRA Products portal

    The Summary of Product Characteristics and Patient Information Leaflet for every medicine licensed in the UK. This is the authoritative document for what a medicine is licensed to do.

Popular on PeptideClear

Research peptides

BPC-157 (UK)

Collagen

Best UK collagen brands 2026

GLP-1

UK GLP-1 clinics compared

Methodology

Trust Index

Vetting

UK retailer directory

Related on PeptideClear

Reviewed by Oliver Mackman, editorial director · last reviewed 2026-08-19T12:00:00.000Z
Trust, Legal and Governance

PeptideClear is a trading name of Best Business Loans Ltd, registered in England and Wales (company number 16833937). All services, operations and publications under the PeptideClear brand are delivered by Best Business Loans Ltd.

Legal and Registration

Registered in England and Wales. Company number 16833937. D‑U‑N‑S 234324824. ICO registered, reference ZC151816 (certificate, verify). Registered supplier on the UK Government's Find a Tender Service (FTS). Details publicly available via Companies House and OpenCorporates.

Standards and Governance

Operates under UK data protection and consumer standards, including UK GDPR.

Domain Continuity

Primary domain peptideclear.co.uk. Business ownership, entity and services remain unchanged. Reviewed quarterly.