Supplier profile

PepSource

Research peptide products, supplier information and the evidence behind the testing claims. Research-use products only.

20 Wenlock Road, London N1 7GU · registered officeCoverage: 16 products tracked

16tracked products

64/100average product score

5verified evidence records

10peptides covered

About the supplier

Company details come from the supplier’s own site and public company records.

Trading name: PepSource
Legal company: PEPSOURCE LTD
Company number: 17345932
Registered office: 20 Wenlock Road, London N1 7GU
Website: pepsource.co.uk

Companies House record ↗

Testing & transparency

Companies House verified: Yes
UK address disclosed: Yes
Contact details: Yes
Shipping policy: Yes
Returns policy: Yes
Batch / testing process explained: Yes

A supplier saying its products are tested is not the same as a published laboratory report for the exact vial. Each product page shows what evidence was actually found.

How we score research peptides →

Supplier score profile

Averages of tracked products, not a separate supplier rating. Products with a pending score are excluded, never counted as zero.

Testing & analytical evidence43/10016 of 16 products

Value for money64/10016 of 16 products

Product identity93/10016 of 16 products

Label & listing transparency100/10016 of 16 products

Tracked products (16)

UK catalogue

Products from PepSource
Product	Quantity	Price / vial	Price / mg	Testing	Score
Tesamorelin 10mgTesamorelin	10 mg / vial	£50.00per vial	£5.00per mg	Testing evidence Evidence status Verified independent evidence Manufacturer statement Every batch is independently third-party tested for HPLC purity and mass-spectrometry identity; the certificate of analysis for the batch you receive is published on our lab results page. Batch AS250910 · Third-party tested Laboratory Janoshik Analytical Certification body Not recorded Batch AS250910 Batch-specific report Recorded Report date 2025-09-12 Evidence checked 2026-09-22 Certificate of analysis ↗	Why this score? Testing & analytical evidence 40/45 Value 18/25 Product identity 14/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now
MOTS-C 10mgMOTS-c	10 mg / vial	£25.00per vial	£2.50per mg	Testing evidence Evidence status Verified independent evidence Manufacturer statement Every batch is independently third-party tested for HPLC purity and mass-spectrometry identity, and the certificate of analysis for the batch you receive is published on our lab results page. Laboratory Freedom Diagnostics Certification body Not recorded Batch MS10-2605-03-IV Batch-specific report Recorded Report date 2026-05-24 Evidence checked 2026-09-22 Certificate of analysis ↗	Why this score? Testing & analytical evidence 39/45 Value 17/25 Product identity 14/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now
GHK-Cu 50mgGHK-Cu	50 mg / vial	£25.00per vial	£0.50per mg	Testing evidence Evidence status Verified independent evidence Manufacturer statement "Every batch is independently third-party tested for HPLC purity and mass-spectrometry identity, and the certificate of analysis for the batch you receive is published on our lab results page." Laboratory Freedom Diagnostics Testing Certification body Not recorded Batch CU50-2605-03-IV Batch-specific report Recorded Report date 2026-05-22 Evidence checked 2026-09-22 Certificate of analysis ↗	Why this score? Testing & analytical evidence 40/45 Value 14/25 Product identity 14/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now
Semax 10mgSemax	10 mg / vial	£35.00per vial	£3.50per mg	Testing evidence Evidence status Verified independent evidence Manufacturer statement "Every batch is independently third-party tested for HPLC purity and mass-spectrometry identity, and the certificate of analysis for the batch you receive is published on our lab results page." "Purity: Verified by HPLC on every batch — the measured figure for your lot is published on its certificate of analysis" Laboratory Freedom Diagnostics Testing Certification body Not recorded Batch XA10-2606-02-IV Batch-specific report Recorded Report date 2026-06-02 Evidence checked 2026-09-22 Certificate of analysis ↗	Why this score? Testing & analytical evidence 40/45 Value 13/25 Product identity 14/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now
BPC-157 10mgBPC-157	10 mg / vial	£40.00per vial	£4.00per mg	Testing evidence Evidence status Verified independent evidence Manufacturer statement Every batch is independently third-party tested for HPLC purity and mass-spectrometry identity; certificate of analysis published on lab results page; 99%+ verified purity; batch-matched certificates are published and independently verifiable. Laboratory Janoshik Analytical Certification body Not recorded Batch AS250910 Batch-specific report Recorded Report date 2025-09-12 Evidence checked 2026-09-22 Certificate of analysis ↗	Why this score? Testing & analytical evidence 40/45 Value 13/25 Product identity 14/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now
MOTS-C 40mgMOTS-c	40 mg / vial	£75.00per vial	£1.88per mg	Testing evidence Evidence status Testing claimed Manufacturer statement Batch MS10-2605-03-IV · Third-party tested; Every batch is independently third-party tested for HPLC purity and mass-spectrometry identity; the certificate of analysis for the batch you receive is published on our lab results page. Laboratory Freedom Diagnostics Certification body Not recorded Batch Not recorded Batch-specific report Not established in this record Report date Not recorded Evidence checked 2026-09-22	Why this score? Testing & analytical evidence 10/45 Value 21/25 Product identity 14/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now
NAD+ 1000mgNAD+	1000 mg / vial	£65.00per vial	£0.07per mg	Testing evidence Evidence status Testing claimed Manufacturer statement Every batch is tested by an independent analytical laboratory for HPLC purity and mass-spectrometry identity before release. Certificates are published per batch and searchable by lot code on our lab results page — you can verify the exact vial you were sent. Laboratory Not recorded Certification body Not recorded Batch Not recorded Batch-specific report Not established in this record Report date Not recorded Evidence checked 2026-09-22	Why this score? Testing & analytical evidence 10/45 Value 21/25 Product identity 14/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now
Retatrutide 40mgRetatrutide	40 mg / vial	£135.00per vial	£3.38per mg	Testing evidence Evidence status Testing claimed Manufacturer statement Every batch is independently third-party tested for HPLC purity and mass-spectrometry identity, and the certificate of analysis for the batch you receive is published on our lab results page. Laboratory Janoshik Analytical Certification body Not recorded Batch Not recorded Batch-specific report Not established in this record Report date Not recorded Evidence checked 2026-09-22	Why this score? Testing & analytical evidence 10/45 Value 20/25 Product identity 14/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now
Retatrutide 20mgRetatrutide	20 mg / vial	£75.00per vial	£3.75per mg	Testing evidence Evidence status Testing claimed Manufacturer statement Every batch is independently third-party tested for HPLC purity and mass-spectrometry identity; the certificate of analysis for the batch you receive is published on our lab results page. Laboratory Janoshik Analytical Certification body Not recorded Batch Not recorded Batch-specific report Not established in this record Report date Not recorded Evidence checked 2026-09-22	Why this score? Testing & analytical evidence 10/45 Value 18/25 Product identity 14/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now
Wolverine Stack 20mgWolverine (BPC-157 + TB-500)	20 mg / vial	£60.00per vial	£3.00per mg	Testing evidence Evidence status Testing claimed Manufacturer statement Every batch is independently third-party tested for HPLC purity and mass-spectrometry identity. Certificates are published per batch and searchable by lot code on our lab results page. This batch was independently tested by Janoshik Analytical. Laboratory Janoshik Analytical Certification body Not recorded Batch Not recorded Batch-specific report Not established in this record Report date Not recorded Evidence checked 2026-09-22	Why this score? Testing & analytical evidence 10/45 Value 18/25 Product identity 14/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now
NAD+ 500mgNAD+	500 mg / vial	£40.00per vial	£0.08per mg	Testing evidence Evidence status Testing claimed Manufacturer statement Every batch is independently third-party tested for HPLC purity and mass-spectrometry identity, and the certificate of analysis for the batch you receive is published on our lab results page. Each batch is tested by an independent analytical laboratory for HPLC purity and mass-spectrometry identity before release. Laboratory Not recorded Certification body Not recorded Batch Not recorded Batch-specific report Not established in this record Report date Not recorded Evidence checked 2026-09-22	Why this score? Testing & analytical evidence 10/45 Value 18/25 Product identity 14/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now
GHK-Cu 100mgGHK-Cu	100 mg / vial	£45.00per vial	£0.45per mg	Testing evidence Evidence status Testing claimed Manufacturer statement Every batch is independently third-party tested for HPLC purity and mass-spectrometry identity, and the certificate of analysis for the batch you receive is published on our lab results page. Laboratory Freedom Diagnostics Testing Certification body Not recorded Batch Not recorded Batch-specific report Not established in this record Report date Not recorded Evidence checked 2026-09-22	Why this score? Testing & analytical evidence 10/45 Value 16/25 Product identity 14/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now
Wolverine Stack 10mgWolverine (BPC-157 + TB-500)	10 mg / vial	£40.00per vial	£4.00per mg	Testing evidence Evidence status Testing claimed Manufacturer statement "Every batch is independently third-party tested for HPLC purity and mass-spectrometry identity"; "the certificate of analysis for the batch you receive is published on our lab results page"; "Purity: Verified by HPLC on every batch — the measured figure for your lot is published on its certificate of analysis" Laboratory Janoshik Analytical Certification body Not recorded Batch Not recorded Batch-specific report Not established in this record Report date Not recorded Evidence checked 2026-09-22	Why this score? Testing & analytical evidence 10/45 Value 14/25 Product identity 14/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now
KLOW Blend 80mgKLOW blend	80 mg / vial	£75.00per vial	£0.94per mg	Testing evidence Evidence status Testing claimed Manufacturer statement "Every batch is independently third-party tested for HPLC purity and mass-spectrometry identity, and the certificate of analysis for the batch you receive is published on our lab results page." Laboratory Janoshik Analytical Certification body Not recorded Batch Not recorded Batch-specific report Not established in this record Report date Not recorded Evidence checked 2026-09-22	Why this score? Testing & analytical evidence 10/45 Value 14/25 Product identity 13/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now
Selank 10mgSelank	10 mg / vial	£35.00per vial	£3.50per mg	Testing evidence Evidence status Testing claimed Manufacturer statement Batch AS20260623 · Third-party tested; Every batch is independently third-party tested for HPLC purity and mass-spectrometry identity; certificates are published per batch and searchable by lot code on our lab results page. Laboratory Janoshik Analytical Certification body Not recorded Batch Not recorded Batch-specific report Not established in this record Report date Not recorded Evidence checked 2026-09-22	Why this score? Testing & analytical evidence 10/45 Value 13/25 Product identity 14/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now
BPC-157 5mgBPC-157	5 mg / vial	£25.00per vial	£5.00per mg	Testing evidence Evidence status Testing claimed Manufacturer statement "Every batch is independently third-party tested for HPLC purity and mass-spectrometry identity, and the certificate of analysis for the batch you receive is published on our lab results page." Laboratory Janoshik Analytical Certification body Not recorded Batch Not recorded Batch-specific report Not established in this record Report date Not recorded Evidence checked 2026-09-22	Why this score? Testing & analytical evidence 10/45 Value 10/25 Product identity 14/15 Supplier transparency 10/10 Label & listing transparency 5/5 Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.	Buy Now

Transparency summary

What the current records support, and where evidence is incomplete.

What we could verify

Trading company: PEPSOURCE LTD (company number 17345932).
The company number resolves to an active company on Companies House.
Registered office: 20 Wenlock Road, London N1 7GU.
16 research peptide products tracked across 10 peptides.
5 product records have a verified independent laboratory report.
The supplier explains how batches are tested and traced.

What we could not verify

Evidence applies to the stated products and batches, not everything the supplier sells.

Not confirmed does not mean it does not exist. A supplier’s own statements are distinct from independently verified testing.

Sources & last reviewed

Last reviewed: 22 Sep 2026

Supplier details are taken from the supplier’s own site and Companies House; product testing evidence keeps its recorded status.