Why this article exists
The UK research-peptide market is unregulated at the supply level. There is no MHRA marketing authorisation involved (these are not medicines), no FSA food framework (these are not food), no specific licensing body. Suppliers register at Companies House like any other limited company and operate under general consumer law.
The result, predictably, is a market with two categories of supplier: a relatively small number of legitimate UK operations, and a much larger churn of short-lived "flip and burn" sites that take payment, ship low-quality or wrong-compound product (or nothing at all), and disappear before the bad reviews catch up with them.
This is bad for buyers, and it is bad for legitimate suppliers - we lose new customers who try a fake site first, get burned, and conclude the whole category is untrustworthy. So this article is in our self-interest as well as yours: more buyers learning to vet suppliers means a less hospitable environment for the bad ones.
I'm Joe, founder of Black & White Peptides Ltd. I've spent two years inside this market and I'm going to tell you the actual signals I look for when I vet a competitor or recommend a supplier I don't have stock of. None of the signals individually proves anything; the picture comes from running them all and counting how many a supplier passes.
The 12-point checklist
Companies House registration
Search the supplier name at find-and-update.company-information.service.gov.uk. A real UK supplier will have a verifiable company number, named directors, an active confirmation statement filed within the last 14 months, and (after their first year) annual accounts on file.
The 8-digit company number on a legitimate supplier's site should resolve to a Companies House page that matches the trading name. If the page shows "dissolved", "in liquidation", or a different trading activity entirely, that is a hard red flag.
Green flag Active company, named directors, recent confirmation statement.
Red flag No company number on site, dissolved/struck-off status, or 8-digit number that doesn't resolve.
Registered office address
Drop the registered office into Google Maps. A residential address can be legitimate (small UK businesses commonly register at the founder's home), so don't auto-flag those. The pattern that matters is whether the address is being used as a high-volume mailbox-only service with hundreds of unrelated companies registered at it.
Be honest, this one applies to us too. Black & White Peptides Ltd is registered at 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ. That's a Companies-Made-Simple-style shared service address. The reason a UK research-peptide supplier might choose this rather than a residential address is the same reason a barrister or a small consultancy chooses it: privacy, mail handling, and an official-looking address for client-facing documents. The signal is not "is the address shared" but "is the supplier transparent about why they use it." If the site claims a London-flagship-laboratory at a service address that is just a mail-forwarding desk, that's the red flag.
Green flag Address verifiable, supplier transparent about its function.
Amber flag Service address presented as a manufacturing or research facility.
Red flag Address that doesn't exist, or resolves to a totally unrelated business.
Independent third-party HPLC
This is the single highest-weight signal. A legitimate research-peptide supplier publishes batch HPLC reports from a verifiable third-party lab. The Czech specialist Janoshik Analytical is the de facto industry standard for the UK and EU; Alphalab and Akums are also used.
What you're looking for: published reports for actual current batches (not stock images of generic chromatograms), each report with a unique verification key in the header, and the supplier directing you to verify that key on the lab's own portal.
"Tested by our chemist" is not third-party verification. It's marking your own homework. The same applies to "tested at our partner lab" if the partner lab can't be independently looked up and contacted.
Green flag Janoshik / Alphalab / Akums report with batch ID and verification key, verifiable on the lab's portal.
Amber flag Third-party lab named, but no batch-specific reports published, only "we test every batch" claims.
Red flag "In-house testing", no published reports, or reports with no verification key.
Reverse-image-search the "lab" and "warehouse" photography
Right-click any "our lab" or "behind the scenes" image on the supplier site, choose "Search image with Google". Stock photography from Pexels, Unsplash, or Adobe Stock will show the same image used on hundreds of unrelated sites. Overseas factory shots (often with Chinese-language signage cropped out) will appear on Alibaba listings.
This is one of the fastest tells. A legitimate supplier either uses original photography of their actual operation, or doesn't pretend to have a lab they don't have.
Green flag Original photography, or honest absence ("we are a UK distributor, not a manufacturer").
Red flag Stock images presented as the supplier's own facility.
Trustpilot review distribution shape
Trustpilot's algorithm now flags many forms of review manipulation, but the pattern check is still useful as a fast smell test. A legitimate supplier with 50+ reviews will show the natural distribution: most 5-star, a meaningful tail of 4-star, a small number of 3-star and below.
What's suspicious: 100% 5-star with no negative tail; 6 lifetime reviews all from 2024; a sudden burst of 30 5-star reviews within one week (paid review services); reviews that all use similar phrasing or the same uncommon adjectives.
Volume itself is not a signal in either direction. New legitimate suppliers have low volume; some long-running fake operations buy review volume. It's the shape that matters.
Green flag Natural review distribution with a meaningful 1-3 star tail.
Amber flag Very low volume, hard to evaluate.
Red flag Burst patterns, identical-phrasing reviews, 100% 5-star at scale.
WhatsApp / email response, before ordering
Message the supplier with a real question before placing any order. "Do you stock X compound, what batch is current, can you send me the Janoshik report" is a fine test message.
What you want: a real human reply within working hours, in correct English, that actually answers the question. What's worrying: a chatbot that loops, an "ask after you order" deflection, replies that take five days, or replies in broken English that don't address your question.
Green flag Human reply within working hours, fluent and on-topic.
Amber flag Chatbot or canned reply, takes 24+ hours.
Red flag No reply, replies in fragments, deflects pre-order questions to "after payment".
UK shipping origin
A "UK supplier" should ship from a UK address with a UK Royal Mail (or DPD, or Evri) tracking number. The tracking number format alone tells you the origin: GB-prefixed Royal Mail numbers, UK courier formats. A 13-character CN/HK prefix on the tracking number means it's coming from China and transiting customs even if the website says "UK shipping."
If a supplier says "UK shipping" but only ships after a 7-10 day "processing time" before the tracking number activates, the maths usually means they're drop-shipping from overseas and re-labelling at a UK fulfilment desk.
Green flag Royal Mail GB tracking number, dispatched same-day or next-day.
Amber flag 5+ day "processing" before tracking activates.
Red flag CN/HK/SG tracking format, customs transit on a "UK supplier" order.
Payment language transparency
UK research-peptide suppliers default to bank transfer because mainstream card processors decline this category. That's the industry-wide reality, not a supplier-specific choice. So bank transfer is normal, and a supplier explaining honestly why bank transfer is the norm is a positive signal, not a negative one.
What's worrying: a card-payment logo from a processor that doesn't actually serve this category (Stripe, PayPal, Square, Klarna). If a peptide supplier's site shows a Stripe checkout, either the processor will shut it down within weeks, or there's a sub-merchant relationship hiding the real merchant identity. Both outcomes are bad for the buyer who paid by card.
If the supplier accepts crypto, that is also normal in this category - it bypasses the processor problem - but it should be in addition to a clean bank-transfer flow, not in place of it.
Green flag Bank transfer + clear written explanation. Crypto as additional option.
Amber flag Card logos from mainstream processors that don't normally serve this category.
Red flag Cash-on-delivery, gift cards, "send via Western Union", direct-to-personal-bank-account payments.
(Read our full transparency note: Why bank transfer is the UK research-peptide payment norm.)
Pricing sense-check
Compare any compound across at least three UK suppliers. Both extremes are warnings.
"Too cheap" is the more common scam shape: a Retatrutide 10mg vial at £15 when the UK market price is £55-75 means either (a) the vial isn't Retatrutide, (b) the vial isn't 10mg, or (c) you'll never receive a vial at all. Real research-grade synthesis costs are not zero, and Janoshik HPLC testing isn't free either. A price below the cost of those inputs is a price subsidised by something you won't like.
"Too expensive" is rarer but exists. Premium pricing only makes sense if the premium buys you something concrete (a longer shelf life, a tested-to-EP standard reference grade, faster shipping). If the only thing you're paying for is "trust", look for trust signals you can verify rather than a price tag.
Green flag Price within ±25% of UK market median for that compound.
Amber flag Outlier pricing without a clear reason.
Red flag Price below plausible cost of synthesis + testing + UK overhead.
Research-use-only legal framing
Read the supplier's product copy. Are the compounds presented as research-grade reference reagents (the legal supply category), or as therapeutics with implicit dosing protocols and "weight loss" claims?
The latter is mis-selling. To sell something for human use in the UK requires MHRA marketing authorisation, which is a different and far more involved regulatory pathway. A supplier who blurs that line is either uninformed about the law (in which case other things will also be wrong) or is calculating that the buyer doesn't know the law (in which case other things will also be wrong).
Legitimate research-peptide suppliers worldwide - Sigma-Aldrich, Cayman Chemical, Tocris, Bachem - all sell strictly under the research-use-only frame. UK suppliers should do the same.
Green flag Strict research-use-only framing throughout.
Amber flag Mostly research-framed but with "for personal use" winks.
Red flag Therapeutic claims, dosing protocols, "weight loss" or "anti-ageing" marketing.
Domain age
Look up the domain at whois.domaintools.com or any WHOIS lookup tool. A legitimate supplier domain typically has 12+ months of registration history with a renewal in the past year. A flip-and-burn operation typically uses domains registered in the past 1-3 months.
This is a soft signal because legitimate new suppliers exist (we are one - Black & White Peptides Ltd was incorporated 26 November 2025). Combine domain age with all the other signals rather than treating it as decisive on its own.
Green flag 12+ months of domain history, multi-year renewal.
Amber flag 3-12 months of history, especially if the supplier claims "established" status.
Red flag Less than 30 days of domain history paired with other red flags.
Real founder or transparent ownership
Is there a named founder or owner with a real bio, a real LinkedIn profile, a real personal voice in the writing? Or is the company entirely faceless, with no human accountability anywhere?
The fully-anonymous supplier isn't always fake (some legitimate operators value privacy), but it removes one of the strongest positive signals. The named-founder supplier is making themselves personally accountable for the operation, which is harder to fake than a generic "About us" page.
You can read our founder note at /about/founder.html for what this looks like in practice.
Green flag Named founder, real bio, personal voice in the writing.
Amber flag Anonymous but with consistent voice and history.
Red flag Stock-photo "team page", AI-generated bios, no human contact at all.
Run Black & White Peptides through the same checklist
Anyone publishing a "spot the fake" article who refuses to be measured by the same checklist is being self-serving. Here's our honest scoring on the same twelve checks:
Black & White Peptides Ltd: self-score
| Check | Status | Notes |
|---|---|---|
| 1. Companies House | Pass | Active company, number 16876162, incorporated 26 Nov 2025. |
| 2. Registered office | Pass | 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ. We disclose that this is a Companies-Made-Simple service address. We are a distributor, not a synthesis lab. |
| 3. Third-party HPLC | Pass | Janoshik Analytical with verifiable batch keys. Sample reports published. Note: Janoshik reports are supplied with the order where one has been issued for the current batch; we do not yet test 100% of our SKUs. |
| 4. Photography | Partial | We currently use mostly product photography from our suppliers and stock-style imagery. Original photography of our actual fulfilment operation is in progress (planned April-May 2026). We don't claim a "lab" we don't have. |
| 5. Trustpilot pattern | Pass | 19 reviews, 4.7 average. Natural distribution. |
| 6. WhatsApp / email response | Pass | Average reply time during UK working hours is under 30 minutes. Same human (me, mostly) replies. Email at info@blackandwhitepeptides.co.uk, WhatsApp +44 7886 853464. |
| 7. UK shipping | Pass | Royal Mail Tracked 24 from UK, GB-prefix tracking, same-day dispatch on weekday orders before 2pm. |
| 8. Payment transparency | Pass | UK bank transfer only, with full written explanation of why at /research/how-orders-work.html#why-bank-transfer. Open Banking and crypto integration in progress. |
| 9. Pricing | Pass | Within UK market median band. We're not the cheapest and not the most expensive. |
| 10. Research-use-only framing | Pass | Strict throughout. We never give dosing or human-use guidance. |
| 11. Domain age | Partial | Domain registered November 2025, ~5 months at time of writing. Combined with Companies House registration, this is what a new but legitimate UK supplier looks like. Will graduate to green flag in November 2026. |
| 12. Founder transparency | Pass | Named founder (Joe), real founder note, my voice on this and other articles. |
Self-score: 10/12 green, 2/12 amber, 0/12 red. The two amber items (photography, domain age) will both move to green during 2026 as we ship original photography and the domain ages past 12 months. We'll update this article when those shift.
What to do if you've already paid a supplier you now think is fake
If you paid by UK bank transfer, contact your bank's fraud team within 24 hours and request a recall under the Authorised Push Payment (APP) reimbursement framework. The mandatory APP reimbursement rules introduced by the Payment Systems Regulator in October 2024 have meaningfully improved outcomes; banks now have a presumption of reimbursement for APP fraud unless the customer was grossly negligent.
Report the supplier to Action Fraud at actionfraud.police.uk. Even if your individual case is unlikely to recover funds, every report builds the pattern record that helps future victims and can trigger regulatory action.
If the parcel does arrive, do not consume the contents. Dispose of as laboratory waste. Without a verified Janoshik or equivalent third-party report, you have no idea what is actually in the vial - the wrong compound, contaminated batch, or unverified concentration are all common.
The shorter version, if you don't want to read all that
- Look up the company at Companies House. If they're not there, stop.
- Find a published Janoshik (or equivalent) report for a current batch. If they don't have one, stop.
- Send a real WhatsApp message before ordering. If you don't get a real human reply within working hours, stop.
- Sense-check the price across two other suppliers. If it's wildly outside the band, stop.
- Confirm UK shipping with a UK tracking number after dispatch. If the tracking number is from China, stop.
If a supplier passes those five, the chance you're dealing with a fake drops dramatically. The other seven checks are confirmation rather than novel information.
FAQ
Why is bank transfer the norm for UK research peptide suppliers?
Mainstream payment processors (Stripe, PayPal, Worldpay) classify research-chemical suppliers as high-risk and decline applications, regardless of the legal status of the compounds. The category is excluded by their merchant agreements. So legitimate UK suppliers default to bank transfer (UK Faster Payments settles in seconds and is fee-free). A processor logo on a peptide-supplier site is more often a red flag than a green flag - it usually indicates either an unauthorised processor that will be shut down, or a sub-merchant relationship that hides the real merchant identity.
How do I verify a Janoshik report is real?
Every legitimate Janoshik Analytical Certificate of Analysis carries a unique verification key in the report header. You can authenticate the key against Janoshik's own records by typing or scanning the batch ID into their public verification portal. If the supplier cannot produce a verification key, or the key fails verification, the report is forged. Read our full walkthrough at How to read a Janoshik HPLC report.
Is a Companies House registration enough to verify a supplier?
No, but it is the necessary first step. Companies House registration confirms the supplier exists as a UK legal entity, has named directors who can be held accountable, and files annual accounts. It does not confirm anything about product quality, fulfilment reliability, or customer service. Combine the Companies House check with the lab verification, Trustpilot pattern check and shipping-origin check for a full picture.
What if I have already paid a supplier I now think is fake?
If you paid by UK bank transfer, contact your bank immediately and request an Authorised Push Payment (APP) reimbursement under the Contingent Reimbursement Model code. Outcomes are mixed but improving since the new mandatory APP rules came in October 2024. Report the supplier to Action Fraud (actionfraud.police.uk). If the parcel arrives, do not consume the contents - dispose of as laboratory waste.
Are overseas suppliers always less safe than UK ones?
Not always less safe in the abstract - some Chinese and Indian peptide synthesis houses produce material for major Western contract manufacturers. The problem is what happens when you order direct as a UK customer: the parcel transits customs, the supplier sits outside UK consumer protection law, and the typical "lab report" is signed by their own in-house chemist with no third-party verification. UK-domestic supply removes all four of those failure modes.
Why does the article include Black & White Peptides scoring itself?
Because anyone publishing a "how to spot a fake" checklist who refuses to be measured by the same checklist is being self-serving. The whole point of a fair test is that it must be fair to everyone, including the author. We score ourselves transparently in the article so a buyer comparing UK suppliers can apply the test to us in exactly the same way they would apply it to any other supplier. If we ever fail one of these tests, we will update the article to reflect that.