Laboratories and testing services with a confirmed facility in United Kingdom, with the testing services, locations and ordering details each publishes on its own website.
Testing services and ordering details documented by each ranked laboratory.
| # | Facility | Score | Purity | Identity | Quantity / net content | Endotoxin | Sterility | Heavy metals | Accreditation stated | Pricing | Report lookup |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Marfleet Analytical ServicesKingston-upon-Hull, East Riding of Yorkshire | 6.0 | ✓ | ✓ | ✓ | ✓ | – | ✓ | – | ✓ | – |
| 2 | Doverin LabsCambridge, Cambridgeshire | 5.7 | ✓ | ✓ | ✓ | – | – | – | – | – | ✓ |
✓ = documented on the company's own website as of 2026-09-30. – = not found in public sources; it does not mean the service is unavailable.
Performs the analyses in its own laboratory.
Not scored: Fewer than two of purity, identity and quantity testing documented
Takes orders and sends samples to one or more partner laboratories; it does not perform the analyses itself.
Not scored: Testing coordinator: samples are analysed by partner laboratories
Synthesises or sells peptides and also offers analytical testing; not an independent testing laboratory.
Not scored: Manufacturer offering analytical services, not an independent testing lab; Fewer than two of purity, identity and quantity testing documented
The PAL Testing Evidence Score (v1) awards up to 30 points for information a testing business publishes about itself, shown on a 0–10 scale:
Anything we could not find earns no points and is shown as “Not found in public sources” — it is not treated as a “no”. Only laboratories that perform the analyses themselves, are operating, accept outside samples, have a confirmed facility in the country and document at least two of purity, identity and quantity testing are ranked. Coordinators, manufacturers with analytical services, global networks and planned facilities are listed separately without a number.
By the PAL Testing Evidence Score: up to 30 points for facility transparency, analytical scope, quality and reporting, and ordering transparency, based only on what each business publishes on its own website. Ties are broken by the number of documented testing services, then by name.
Country pages only include businesses whose own website places a facility in United Kingdom. Accepting or collecting samples from a country is not the same as testing there.
A laboratory runs the analyses itself. A testing coordinator takes orders and forwards samples to partner laboratories. Coordinators are listed separately and are not ranked against laboratories.
No. PAL Pro adds profile features for verified owners. It does not change any finding, score, eligibility or position.
It is listed without a number when it is not an independent laboratory, is not yet operating, its facility location is not confirmed, or it documents fewer than two of purity, identity and quantity testing. The reason is shown on its card.