For laboratory research use only · Not for human consumption · No products evaluated for medical or therapeutic purpose
C Compound Buyer
UK Research-Supply Trade Review
2026 Trust & Transparency Index

Six UK suppliers, ranked on the things that actually earn buyer trust.

An independent trade review of UK-registered research-peptide suppliers. We rated each on ten verifiable criteria covering Certificate of Analysis disclosure, batch traceability, ISO standards, payment integrity and post-sale conduct.

By the Compound Buyer editorial team Research period: Jan – Apr 2026 Edition 2026.1 Reading time 9 min

About this index

This index reviews businesses supplying peptides for laboratory and in-vitro research use only. We evaluate corporate practice, not products.

No advertising fees, no affiliate links, no referral tracking. Suppliers cannot pay to enter the index, change a score, or be excluded from one. Any commercial relationship is disclosed in the colophon.

UK research laboratory with analytical instruments
What we looked for

Three signals that separate a serious supplier from a shopfront.

01

A Certificate of Analysis you can actually find.

Per-batch CoAs, named third-party laboratory, archive on the public site. The one piece of documentation a buyer can independently verify before placing an order.

02

A real UK business behind the URL.

Active Companies House registration, accounts up to date, named directors, a registered address that isn't a virtual mailbox. The difference between a supplier and a shell.

03

Payment routes a serious operator would offer.

A tier-1 UK card acquirer enforces onboarding diligence. Cryptocurrency-only checkout, or processors changing every few months, removes that filter.

§ 01  ·  The ranking

Composite scores at a glance.

Out of 100, weighted across ten criteria. One supplier scored materially higher on the dimensions that matter to research procurement.

Composite score · 0 – 100Higher = stronger trust profile
Black & White Peptides
84
UK Peptides
79
Revion
75
Anglopeptides
70
Meridian Labs UK
64
Proforma Peptides
58
Composite scores · weighted across ten criteria · range 0–100. Download as PDF  ↓
5 of 6
Failed at least one disclosure check
Five of the six suppliers we audited could not produce a verifiable Certificate of Analysis archive on a public-facing page at the date of last update.
4 of 6
Listed only a virtual address
Four suppliers used virtual mailbox addresses, webform-only contact, or could not be matched to an active Companies House registration.
26 pt
Spread, top to bottom
The composite gap between the highest- and lowest-ranked supplier in this edition. Tighter than 2025.2 — but only one supplier cleared 80.
£0
Advertising taken
No advertising fees, no affiliate links, no referral tracking. Suppliers cannot pay to enter the index, change a score, or be excluded from one.
§ 02  ·  The scorecard

Ten criteria, rated independently.

Each criterion is rated Strong, Adequate or Concern based on publicly verifiable evidence. Use the filters to focus on a single category, or click a section header to collapse it.

Criterion Black & White Peptides№ 01 UK Peptides№ 02 Revion№ 03 Anglopeptides№ 04 Meridian Labs UK№ 05 Proforma№ 06
A  ·  Analytical disclosure & batch traceability
Independent Certificate of AnalysisPer-batch CoAs from a named third-party laboratory. StrongPer-batch CoAs from a named ISO/IEC 17025 laboratory; archive accessible from public site. AdequateSelected results published; testing laboratory not consistently named. AdequateQuarterly summary documents available; per-batch traceability not located. AdequateRecent batches available; older archive not retained on public site. Adequate"Tested" stated on packaging; supporting documentation not located on public site. ConcernNo CoA archive located on public-facing site at observation date.
Manufacturing transparencyOrigin of stock, ISO 9001 / GMP certifications, supplier disclosure. StrongUK manufacturing partner disclosed; ISO 9001 certificate published. AdequateEU sourcing stated; supporting certification not located. AdequateGeneric "EU/UK" claim; independent verification not located. AdequateUK fulfilment confirmed; manufacturing origin not stated on site. Adequate"UK-supplied" stated; manufacturing origin not specified. ConcernNo origin disclosure located on public site at observation date.
B  ·  Corporate & regulatory hygiene
Companies House statusActive registration, age of company, accounts up to date. StrongActive registration; full accounts filed on time across last three cycles. StrongActive registration with longer trading history; micro-entity accounts current. AdequateActive registration; one confirmation statement filed late in last cycle. AdequateActive registration; first-year accounts filed close to deadline. AdequateActive registration; multiple director changes in last 12 months. AdequateTrading name visible; matching active UK entity not located in public register.
Public contactabilityReal address, phone line, named directors visible on the trading site. StrongRegistered address, phone line and two directors named on the trading site. AdequatePostal address listed; no phone line on site. AdequatePostal address and one director listed; phone via webform request. AdequatePostal address listed; webform-only contact route. AdequatePostal address and director listed; phone line not located. ConcernWebform-only contact; postal address not located on public site.
Privacy & GDPR postureCookie consent, SAR contact, ICO registration, plain-English policy. StrongICO registration on file; SAR route documented; granular cookie consent. AdequatePolicy present; cookie banner partial on first visit. StrongICO registration on file; plain-language policy on site. AdequateBoilerplate policy; SAR contact not located. AdequateICO registration on file; cookie consent partial. AdequatePolicy located; ICO registration not located in public register.
C  ·  Commercial integrity
Payment securityTier-1 merchant processor, 3-D Secure, sensible payment options. StrongMajor UK card acquirer; 3-D Secure 2 enforced; cards and bank transfer offered. AdequateCards available via secondary processor; cryptocurrency offered as default option. AdequateCards available; processor changed during last twelve months. AdequateCards and cryptocurrency; 3-D Secure not consistently enforced on mobile. AdequateCards available; two processor changes in last twelve months. AdequateCards available; cryptocurrency presented prominently at checkout.
Returns & refunds clarityPlainly worded policy, statutory rights honoured, refund window stated. Strong14-day refund window stated in plain English; refund route documented. AdequatePolicy present; placement within T&Cs reduces visibility. AdequatePolicy present; case-by-case wording reduces clarity. AdequatePolicy present; refund window not specified. AdequatePolicy present; "all sales final" wording on certain product pages. AdequateBrief policy located; refund window and route not specified.
Cold-chain & dispatch transparencyStated dispatch SLA, tracked shipping, courier named, temperature handling. AdequateDispatch SLA stated; tracked courier named; cold-chain handling not explicitly addressed. StrongNext-day dispatch claim met in mystery-shop test; tracked shipping by default. AdequateSLA stated; tracked shipping at additional cost only. AdequateSLA stated; performance not consistently met in observation period. AdequateSLA not stated; tracking optional at checkout. AdequateNo dispatch SLA on site; courier not named publicly.
D  ·  Procurement experience
Procurement-enquiry responsivenessTime to first substantive reply on a uniform mystery-shop enquiry. AdequateFirst reply: 9h 22m; substantive answer received same day. StrongFirst reply: 2h 41m; substantive answer same day. StrongFirst reply: 3h 50m. AdequateFirst reply: 1d 4h. AdequateFirst reply: 1d 9h. AdequateFirst reply: 3d 6h.
Public review reputationTrustpilot volume, score, and rate of replies to negative reviews. Adequate4.4 / 5 across 280+ reviews; 70% reply rate to 1–2★ reviews. Strong4.6 / 5 across 800+ reviews; 80% reply rate to 1–2★ reviews. Adequate4.2 / 5 across 300+ reviews; 40% reply rate. Adequate4.0 / 5 across 220+ reviews; mixed reply behaviour. Adequate3.9 / 5; clustered 5-star activity in a single week of 2025 flagged but not weighted. Adequate3.4 / 5 across < 90 reviews; small base.
Composite score 84/ 100 79/ 100 75/ 100 70/ 100 64/ 100 58/ 100
№ 01 · Index leader84/100

Black & White Peptides

A · Disclosure & traceability
Independent CoAStrongPer-batch CoAs from a named ISO/IEC 17025 laboratory; archive accessible from public site.
Manufacturing transparencyStrongUK manufacturing partner disclosed; ISO 9001 certificate published.
B · Corporate & regulatory
Companies HouseStrongActive registration; full accounts filed on time across last three cycles.
Public contactabilityStrongRegistered address, phone line, and two directors named on trading site.
Privacy & GDPRStrongICO registration on file; SAR route documented; granular cookie consent.
C · Commercial integrity
Payment securityStrongMajor UK card acquirer; 3-D Secure 2 enforced; cards + bank transfer.
Returns & refundsStrong14-day refund window stated in plain English; route documented.
DispatchAdequateDispatch SLA stated; cold-chain handling not explicitly addressed.
D · Procurement experience
Enquiry responseAdequateFirst reply: 9h 22m; substantive answer same day.
Public reputationAdequate4.4 / 5 across 280+ reviews; 70% reply rate.
№ 0279/100

UK Peptides

Independent CoAAdequateSelected results published; testing laboratory not consistently named.
ManufacturingAdequateEU sourcing stated; supporting certification not located.
Companies HouseStrongActive registration with longer trading history; accounts current.
ContactabilityAdequatePostal address listed; no phone line on site.
Privacy & GDPRAdequatePolicy present; cookie banner partial on first visit.
Payment securityAdequateCards via secondary processor; cryptocurrency offered as default option.
Returns & refundsAdequatePolicy present; placement within T&Cs reduces visibility.
DispatchStrongNext-day dispatch claim met in mystery-shop test.
Enquiry responseStrongFirst reply: 2h 41m; substantive answer same day.
ReputationStrong4.6 / 5 across 800+ reviews; 80% reply rate.
№ 0375/100

Revion

Independent CoAAdequateQuarterly summary documents available; per-batch traceability not located.
ManufacturingAdequateGeneric "EU/UK" claim; independent verification not located.
Companies HouseAdequateActive registration; one confirmation statement filed late.
ContactabilityAdequatePostal address and one director listed; phone via webform.
Privacy & GDPRStrongICO registration on file; plain-language policy on site.
Payment securityAdequateCards available; processor changed during last twelve months.
Returns & refundsAdequatePolicy present; case-by-case wording reduces clarity.
DispatchAdequateSLA stated; tracked shipping at additional cost only.
Enquiry responseStrongFirst reply: 3h 50m.
ReputationAdequate4.2 / 5 across 300+ reviews; 40% reply rate.
№ 0470/100

Anglopeptides

Independent CoAAdequateRecent batches available; older archive not retained on public site.
ManufacturingAdequateUK fulfilment confirmed; manufacturing origin not stated on site.
Companies HouseAdequateActive registration; first-year accounts filed close to deadline.
ContactabilityAdequatePostal address listed; webform-only contact route.
Privacy & GDPRAdequateBoilerplate policy; SAR contact not located.
Payment securityAdequateCards and cryptocurrency; 3-D Secure not consistently enforced on mobile.
Returns & refundsAdequatePolicy present; refund window not specified.
DispatchAdequateSLA stated; performance not consistently met.
Enquiry responseAdequateFirst reply: 1d 4h.
ReputationAdequate4.0 / 5 across 220+ reviews; mixed reply behaviour.
№ 0564/100

Meridian Labs UK

Independent CoAAdequate"Tested" stated on packaging; supporting documentation not located on public site.
ManufacturingAdequate"UK-supplied" stated; manufacturing origin not specified.
Companies HouseAdequateActive registration; multiple director changes in last 12 months.
ContactabilityAdequatePostal address and director listed; phone line not located.
Privacy & GDPRAdequateICO registration on file; cookie consent partial.
Payment securityAdequateCards available; two processor changes in last twelve months.
Returns & refundsAdequatePolicy present; "all sales final" wording on certain product pages.
DispatchAdequateSLA not stated; tracking optional at checkout.
Enquiry responseAdequateFirst reply: 1d 9h.
ReputationAdequate3.9 / 5; clustered 5-star activity in a single week of 2025 flagged but not weighted.
№ 0658/100

Proforma Peptides

Independent CoAConcernNo CoA archive located on public-facing site at observation date.
ManufacturingConcernNo origin disclosure located on public site at observation date.
Companies HouseAdequateTrading name visible; matching active UK entity not located in public register.
ContactabilityConcernWebform-only contact; postal address not located on public site.
Privacy & GDPRAdequatePolicy located; ICO registration not located in public register.
Payment securityAdequateCards available; cryptocurrency presented prominently at checkout.
Returns & refundsAdequateBrief policy located; refund window and route not specified.
DispatchAdequateNo dispatch SLA on site; courier not named publicly.
Enquiry responseAdequateFirst reply: 3d 6h.
ReputationAdequate3.4 / 5 across < 90 reviews; small base.
“
A supplier that publishes a per-batch Certificate of Analysis tells you something about itself before you have opened the order.
Editorial finding · 2026.1
§ 03  ·  Findings

Three patterns the index made visible.

A 26-point gap between top and bottom is not an accident. The dimensions that decide trust are the ones that are easiest to skip on the way to launching a website — and the easiest for a buyer to verify before placing an order.

Pattern 01

CoA disclosure was the cleanest separator.

One supplier published a per-batch Certificate of Analysis archive from a named ISO/IEC 17025 laboratory, accessible directly from the public site. None of the others did.

Five of six suppliers either offered selective summaries, no archive, or no documentation at all. The single criterion of "can I locate a CoA for the batch I'm buying" would have, on its own, sorted the field correctly.

Pattern 02

Real businesses behaved like real businesses.

The two suppliers in the top three with current Companies House filings, named directors and a registered phone line also scored highest on commercial integrity — not because we weighted them to, but because operators that treat their corporate registration seriously tend to treat their customers seriously.

Conversely, the four suppliers that fell back on virtual mailbox addresses, webform-only contact, or trading-name-only presentation underperformed on returns, refunds and post-sale conduct.

Pattern 03

Payment routes leak information.

Tier-1 UK card acquirers require onboarding diligence — a soft form of regulation that filters out the worst actors before the supplier ever takes an order.

The supplier at the top of the index used a major UK acquirer with 3-D Secure 2 enforced. Three of the others had switched processor at least once in twelve months; one presented cryptocurrency as its default option. None of those signals are conclusive on their own — but together, they sort.

§ 04  ·  Methodology

How we scored each supplier.

A consistent, desk-based protocol applied identically to every supplier. No interviews, no samples, no off-the-record conversations. Every score is anchored in publicly verifiable evidence captured on a single observation window.

Coverage

Six suppliers were selected from a longer list of 23 UK-trading research-peptide retailers identified during desk research. Inclusion criteria: UK-marketing trading site live for at least 12 months, English-language product catalogue, response to a baseline procurement enquiry within 14 days. Suppliers excluded: dormant trading sites, redirects to non-UK entities, suppliers without a public English-language product catalogue, suppliers whose trading site was less than 12 months old at the observation date.

01 / 04

Public-record review

Companies House filings, ICO data-protection register entries and any UK Trading Standards or ASA actions on file. Company age, most recent accounts filed, registered office type, director continuity.

02 / 04

Site & policy audit

A 40-point checklist covering published policies, payment processor identity, on-site CoA disclosure, presence of named directors, and conformity of the cookie banner with UK GDPR.

03 / 04

Procurement mystery-shop

A single, identically-worded pre-purchase question sent to every supplier on the same business morning, from a generic-domain enquiry address. Recorded: time to first substantive reply, accuracy of the answer, escalation offered.

04 / 04

Reputation aggregation

Trustpilot volume, average score and reply rates captured on a single observation date. Statistically anomalous review patterns are flagged but not weighted in the composite score.

Criterion weights — out of 100

  • Independent Certificate of Analysis 18
  • Companies House status 12
  • Payment security 12
  • Manufacturing transparency 10
  • Public contactability 10
  • Public review reputation 9
  • Privacy & GDPR posture 8
  • Returns & refunds clarity 8
  • Procurement-enquiry responsiveness 8
  • Cold-chain & dispatch transparency 5

Weights reflect editorial judgement about which signals are most independently verifiable by a buyer before placing an order. CoA disclosure, Companies House standing and payment security carry the heaviest weight because they are the three things a buyer can check, in five minutes, without contacting the supplier.

Glossary

Certificate of Analysis (CoA)
A laboratory-issued document showing identity, purity and impurity profile for a specific batch of a substance. A reliable CoA names the testing laboratory, dates the result, and ties it to a batch number printed on the product.
ISO/IEC 17025
The international accreditation standard for testing and calibration laboratories. A laboratory holding 17025 accreditation has demonstrated technical competence to a national accreditation body — UKAS in the UK.
Batch traceability
The ability to match a product in your hand to the specific manufacturing run it came from, and to a CoA covering that run. A "tested in-house" claim with no batch number is not traceability.
3-D Secure 2 (3DS2)
A bank-side authentication step on card payments that meaningfully reduces fraud and gives the buyer chargeback recourse. Tier-1 UK card acquirers enforce it by default.
ICO registration
UK companies that process personal data must register with the Information Commissioner's Office. The register is public; absence of registration on a UK e-commerce site is a verifiable red flag.
Statutory rights / CCRs
The Consumer Contracts Regulations 2013 give UK consumers a 14-day cancellation window on most distance purchases. Phrases like "all sales final" do not override these rights.
§ 05  ·  How to choose

Choosing a UK research-peptide supplier — a five-minute checklist.

Whether or not you use this index, the same checks separate a serious operator from a shopfront. They take five minutes per supplier and cost nothing.

Check 01

Locate a Certificate of Analysis for the batch you intend to buy.

Open the supplier's site. Look for a per-batch CoA archive linked from the product page or the footer. The CoA should name the testing laboratory, give a batch number, and date the result. If you cannot find one without contacting the supplier, the supplier is failing the easiest disclosure check there is.

Check 02

Look the company up on Companies House.

Free, instant, public. Search the trading name and any limited company name on the site. You're looking for: active registration, accounts filed in time for at least one full cycle, named directors, registered office that isn't a virtual mailbox. A supplier that doesn't appear in the public register is not a UK supplier in any meaningful sense.

Check 03

Look at the checkout.

Add anything to the basket and proceed. A serious operator works with a tier-1 UK card acquirer and enforces 3-D Secure 2 by default. If the only payment route is cryptocurrency, or the card form looks like a workaround, you are looking at a supplier that has either failed acquirer onboarding or has chosen to avoid it.

Check 04

Read the returns and refunds page.

Look for a stated 14-day refund window and a refund route in plain English. UK consumer law (the Consumer Contracts Regulations 2013) sets that floor; "all sales final" wording does not override it. A policy that quietly tries to override your statutory rights is a tell about how the supplier intends to behave if something goes wrong.

Check 05

Send a single specific question before you order.

One sentence, one specific question. Time how long the substantive reply takes. A supplier that takes more than two business days to answer a pre-purchase enquiry is signalling how it will handle a post-purchase one. The reply is also a sample of the operator's English and judgement.

Check 06

Ignore the marketing copy. Read the boring pages.

Privacy policy, returns page, T&Cs, About page. The marketing pages are written to convert; the policy pages are written by lawyers and reveal the operator's actual operating standards. If the boring pages are boilerplate, generic, or absent, that is the answer.

If you only do one thing

Ask the supplier for a Certificate of Analysis by batch number, from a named ISO/IEC 17025 laboratory, before you place an order. Five of the six suppliers in this index could not produce one without significant chasing. That single check, on its own, sorts the field.

Get the next edition

Twice a year, the new index — directly to you.

Compound Buyer publishes a fresh trust & transparency index every six months. Subscribe and we'll send the next edition the morning it's released, plus interim notices when a supplier's score materially changes.

No marketing emails. No third-party sharing. No promotion of any product or supplier. Unsubscribe in one click from any email.

Last edition delivered to 2,400+ UK research-procurement readers · compoundbuyer.com
§ 06  ·  Reader questions

What this index does, and does not, claim.

Buyer questions, plus a few about the index itself.

How do I read a Certificate of Analysis?

A reliable CoA names the testing laboratory, dates the test, gives a batch number that matches the product in your hand, and states the methodology used (commonly HPLC and mass spectrometry). It reports identity (does this match what was ordered), purity (typically as a percentage) and any impurity profile. A CoA without a batch number, without a named laboratory, or without a date is a marketing document, not a test result.

What does ISO/IEC 17025 actually mean for me?

ISO/IEC 17025 is the international accreditation standard for testing laboratories. A laboratory holding it has been independently audited for technical competence by a national accreditation body (UKAS in the UK). When a supplier publishes a CoA from a 17025-accredited lab, you have an externally verified link in the chain: the test result was produced by a laboratory whose ability to produce reliable results has itself been checked.

Should I avoid suppliers that only accept cryptocurrency?

It is a meaningful negative signal, not a rule. Tier-1 UK card acquirers conduct onboarding diligence before they take a merchant on; cryptocurrency-only checkout removes that filter from the supplier and removes chargeback recourse from you. A supplier offering crypto alongside cards is making a different statement than a supplier offering only crypto. The index treats it as one factor among ten; we recommend buyers treat it as one factor too.

Why don't you discuss specific compounds or human use?

Because this index is about business conduct, not products. The companies reviewed market exclusively for laboratory research use. Compound Buyer does not evaluate, recommend or comment on human use of any compound, and nothing on this page should be read as medical or therapeutic advice.

Are you affiliated with any supplier in the table?

Compound Buyer takes no advertising fees, no affiliate or referral commissions, and operates no e-commerce funnel of its own. Suppliers cannot pay to enter the index, change a score, or be excluded from one. Any commercial relationship the publisher holds with a supplier in the index — past, present or contemplated — is disclosed in the colophon.

How is the score weighted, and will the rankings change?

Each of the ten criteria is weighted between 5 and 18 points, totalling 100, with the heaviest weights on signals a buyer can independently verify before ordering. Weights are published in full in the methodology section and were not changed after the data was gathered. The index is republished twice a year; suppliers whose practices have demonstrably changed will move accordingly. Suppliers may submit written corrections of fact, with documentary evidence, via the editorial address.

About Compound Buyer

Compound Buyer is an independent UK editorial project that evaluates research-supply companies on transparency, governance and post-sale conduct. We do not sell products, accept advertising, or operate referral programmes.

Indexes are produced by a small editorial team applying a common protocol across companies in a single category. We aim to be specific about what we measured, conservative about what we did not, and explicit about both.

Editorial enquiries and corrections: desk [at] compoundbuyer · com

Disclosure. Any commercial relationship the publisher holds with a supplier reviewed in this edition — past, present or contemplated — is recorded here. [Publisher to complete before publication.]

Edition log. 2026.1 is the first edition of this index. Subsequent editions will note score movements, suppliers added, and suppliers removed since the previous edition. Corrections to this edition: none to date.

Important notices

Research use only. All suppliers reviewed market exclusively for laboratory and in-vitro research use. Nothing on this page is medical, clinical or pharmacological advice.

Not a recommendation to buy. A higher rank in this index reflects measured corporate conduct and transparency only. It is not a recommendation to transact with any supplier, or with this category of retailer at all.

Editorial method, not legal opinion. Findings reflect publicly available evidence at the date of last update. They are the editorial opinion of Compound Buyer and are not statements of law, audit or regulatory finding.