Every batch, independently certified

The certificate is published before the vial is listed.

HPLC purity and LC-MS identity from a named UK laboratory, on every lot, in a public register you can search by batch number.

Shop all compounds Verify a batch

The register34 certificates, searchable by batch number.Open the register MonographsStructure, stability and the primary literature for 34 compounds.Read the monographs

Independent laboratoryNamed on every certificate

Same-day dispatchBefore 3pm, Monday to Saturday

Lyophilised, sealed vialsStored cold, shipped discreetly

UK company, UK stockRegistered in England, dispatched from London

Best-selling research peptides

View all 34 compounds

GHK-Cu

Copper & melanocortin · 50 mg, 100 mg

from£16.00Add to basket

GLP-3

Incretin & amylin · 10 mg to 40 mg

from£59.00Add to basket

Tirzepatide

Incretin & amylin · 10 mg, 20 mg, 40 mg

from£45.00Add to basket

MT-2

Copper & melanocortin · 10 mg

£23.00Add to basket

BPC-157

Fragments · 5 mg, 10 mg

from£11.00Add to basket

TB-500

Fragments · 5 mg, 10 mg

from£19.00View

Epithalon

Neuropeptides & other · 10 mg

£19.00View

MOTS-c

Mitochondrial · 10 mg, 40 mg

from£23.00Add to basket

How every batch is tested

Three results, one signed report, published first.

Our methods in full

HPLCPurityReversed-phase chromatography, area-percent purity against the main peak. Reported to two decimals.

LC-MSIdentityObserved mass against the expected mass of the sequence. Confirmed or not, nothing in between.

mgNet contentMeasured peptide content per vial, so the label figure is a measurement rather than a nominal fill.

The register

Every lot. Every report. Public.

Nothing is available on request only. If a batch has shipped, its signed certificate is here, with the figures transcribed beside it and the laboratory named. Type the number from your vial.

Lot	Compound	HPLC %	Report
BK-EPI-10	Epithalon 10 mg	99.67	Report (PDF)
BK-BPC-5	BPC-157 10 mg	98.93	Report (PDF)
BK-BPC-5	BPC-157 5 mg	98.93	Report (PDF)
BK-TB-5	TB-500 10 mg	99.74	Report (PDF)
BK-MOTS-10	MOTS-c 40 mg	99.51	Report (PDF)
BK-GHK-50	GHK-Cu 50 mg	99.93	Report (PDF)

The library

Written for the bench, with the references attached.

All monographs and guides

MonographTirzepatide Peptide: What It Is, Research & CertificatesTirzepatide is a 39-residue dual agonist of the GIP and GLP-1 receptors. Structure, the trial record behind it, UK status and reading its certificate.MonographBPC-157 Peptide: What It Is, Research & CertificatesBPC-157 is a 15-residue peptide from a human gastric protein. What it is, how the literature describes it, UK status, storage and reading its certificate.MonographGHK-Cu Peptide (Copper Peptide): What It Is & ResearchGHK-Cu is the copper complex of Gly-His-Lys, first isolated from human plasma. Structure, how the research describes it, UK status, storage and certificates.GuideBPC-157 vs TB-500 (BPC157 TB500): The Two Peptides ComparedBPC-157 and TB-500 are studied in the same repair models but are unrelated peptides. Structure, mechanism, stability and certificates compared.GuideHow to Read a Peptide Certificate of Analysis (COA)A peptide certificate of analysis read line by line: HPLC purity, mass-spec identity, net peptide content, endotoxin, and the signs of one not to trust.GuideAre Peptides Legal in the UK? Research Peptides and UK LawWhat UK law permits for research peptides: the Medicines Act, Misuse of Drugs Act, Psychoactive Substances Act, WADA, and what research-use-only means.