Trust evidence,
not marketing.
Every week, people across the UK buy peptides on the strength of a marketing claim. We think they deserve the evidence first.
Whether you’re researching a peptide, comparing collagen, or trying to understand GLP-1 medicines, we help you separate evidence from marketing before you decide.
The UK reference
CoA Trust Index
UA is "unavailable," not a grade: 36 more sellers we track but haven't scored yet, plus 8 flagged for in-depth review (unresolved, not graded).
Independently scored · last verified 2026-08-10 · no vendor payment
What this is
PeptideClear works like Which? Trusted Traders or Checkatrade, but for UK research-peptide sellers. Instead of asking other customers what they thought, we check the evidence ourselves: does a seller publish a lab certificate for every batch, is it from a named independent lab, can you actually verify it's real. Same checklist, every UK seller we can find, for free. Nobody pays to be included and nobody pays for a better score.
If you sell research peptides in the UK
You don't need to apply. We identify UK sellers and score what's publicly checkable on your own site. If something we find looks significant, we contact you before publishing so you can add context or correct it. See how scoring works →
Choose your journey
Nobody else has this
The Evidence Map
Every peptide we cover, placed by how far the evidence actually goes, left to right, and grouped by what people use it for. One glance tells you where a compound really sits. Tap any node to open it.
Animal only
304
peer-reviewed studies referenced across our compound pages. We show every source, so you never have to take our word for it.
What changed
Regulatory hub →- MHRA UK first in Europe to authorise orforglipron for weight management and type 2 diabetes 2026-08-10
- MHRA No summer shortcut for safe weight loss 2026-07-24
- MHRA Four sentenced to nearly 15 years combined jail time following major MHRA investigation into illegal online supply of medicines 2026-07-08
- MHRA MHRA grants conditional approval for semaglutide (Wegovy) to treat MASH in adults with moderate to advanced liver fibrosis. 2026-07-03
Evidence, rated plainly
One scale, on every compound. Filled pips show how far the evidence goes: animal work, mixed human data, or human randomised trials. Never hype.
Become a smarter buyer
Learn to verify quality yourself, so you never have to take a vendor’s word for it.
How to verify a CoA
The unique key you check at the lab’s own portal is the only proof the numbers are real. A PDF can be forged in minutes.
What HPLC purity means
Reused chromatograms, no batch number, a mismatched mass. The tells a vendor will never point out to you.
Third-party vs in-house
Why a named, independent lab beats a self-reported figure, and what "research use only" means in UK law.
The independent CoA Trust Index
Every UK research-peptide retailer, graded A to E on certificate transparency. No vendor payment, ever. We publish the fails too.
What we are not
- · We are not a pharmacy. We do not dispense medication.
- · We are not a clinic. We do not prescribe.
- · We do not sell research peptides. We score UK retailers on transparency and link out.
- · We do not promise weight loss numbers, before/after photos, or specific results.
- · We do not recommend a specific medication or supplement to a specific person.
We summarise UK peptide categories in plain English and score suppliers on observable, published signals. We take no vendor payment, and it never changes how we score. The decision is yours. For prescription medicine the prescriber decides. For research peptides the retailer’s "research use only" framing applies.
Before you buy anywhere
How to check a weight-loss medicine seller is legitimate
Every GLP-1 weight-management medicine licensed in the UK is prescription-only, so a site that sells you one without a prescriber is supplying illegally. Check the seller on the GPhC register, check the prescriber on the GMC register, and treat a price well under the registered-pharmacy range as a warning rather than a find. The MHRA reported seizing more than 5,000 illegally traded GLP-1 products in 2025 alone.
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
CoA Trust Index →
158 UK sellers scored on six observable certificate-of-analysis signals, free and independently, on the Which? Trusted Traders / Checkatrade model. Every signal reproducible from the published data.
Source: PeptideClear methodology
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