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QUALITY & TESTING

Proof, batch by batch.

Three layers of testing, with real lab reports.

Three layers of testing

We repeatedly test batches to ensure quality. Instead of relying on one report, every product is covered by three independent layers of checks.

01

Source testing

Our peptide source tests its material before it reaches us.

02

Independent repeated batch testing

We regularly send batches for testing at Freedom Diagnostics Testing, an independent US lab.

03

Community testing

Customers who run their own third-party tests send us their results, adding an outside check.

What the independent lab tests

Batches are repeatedly sent to Freedom Diagnostics Testing, an independent analytical laboratory in the USA. Each sample gets a Certificate of Analysis (COA) with a search code you can verify on the lab's own site.

Identity: LC-MS

Liquid chromatography with mass spectrometry checks that the molecule is what the label says.

Purity: HPLC-UV

High-performance liquid chromatography measures the share of the sample that is the target peptide.

Net content

Measures how much peptide is actually in the vial, in mg.

Heavy metals: ICP-MS

Screens for arsenic, cadmium, lead and mercury against reporting limits.

Tested your own vials?

If you've had a PEP LABS product tested by an independent lab, send us the report at hello@peplabs.TODO with your order reference. Community results help everyone. TODO: decide whether and how to publish community results

We only quote figures shown on a published COA. Results apply to the sample tested.

SAMPLE CERTIFICATE OF ANALYSIS

LaboratoryFreedom Diagnostics Testing
ProductTesamorelin 10mg
Lot0002
Accession / codePEPL2609280004
Received / reported28 Sep 2026
Purity (HPLC-UV)99.92%
Identity (LC-MS)Confirmed
Net content10.23 mg
Heavy metals (ICP-MS: As, Cd, Pb, Hg)Pass

Lab disclaimer, from the COA: results are specific to the sample provided. The heavy-metal screen covers As, Cd, Pb and Hg only.

COA library

Two columns per product: certificates commissioned by PEP LABS at Freedom Diagnostics Testing, and third-party certificates published by other buyers and labs for the same peptide. Every batch also ships with a source/supplier COA. Results are specific to the sample tested. PEP LABS certificates: 4 · Third-party linked: 27.

ProductPEP LABSThird party testing
Retatrutide 10mgPEPL2609280008 (PDF) ↗Janoshik ↗
Retatrutide 20mgComing soonJanoshik ↗
Retatrutide 30mgComing soonTestides ↗
Tirzepatide 10mgComing soonFreedom / NovaLabs ↗
Tirzepatide 20mgComing soonJanoshik ↗
HCG 5000IUComing soon—
CJC/IPA 10mgComing soonFreedom / Andres C ↗
Ipamorelin 10mgPEPL2609280006 (PDF) ↗Freedom / NovaLabs ↗
CJC-1295 No DAC 10mgComing soon—
Tesamorelin 10mgPEPL2609280004 (PDF) ↗Freedom / NovaLabs ↗
Tesamorelin 20mgComing soon—
NAD+ 500mgComing soonFreedom / Reviva ↗
NAD+ 1000mgComing soonFreedom / Peptidologix ↗
Epithalon 10mgComing soonTestides ↗
MOTS-c 10mgComing soonJanoshik ↗
MOTS-c 20mgComing soon—
SS-31 10mgComing soonFreedom / NovaLabs ↗
IGF-1 LR3 10mgComing soon—
Glutathione (Pharm Grade) 1500mgComing soon—
PT-141 10mgComing soonFreedom / Reviva ↗
Kisspeptin 10mgComing soonFreedom / NovaLabs ↗
Selank 10mgComing soonFreedom / Peptidologix ↗
Semax 10mgComing soonFreedom / Peptidologix ↗
Adamax 10mgComing soon—
Glow 70mgComing soonFreedom / NovaLabs ↗
KLOW 80mgPEPL2609280002 (PDF) ↗Freedom / NovaLabs ↗
GHK-Cu 50mgComing soonFreedom / NovaLabs ↗
GHK-Cu 100mgComing soonFreedom / NovaLabs ↗
Thymosin Alpha-1 10mgComing soonFreedom / Peptidologix ↗
BPC-157 10mgComing soonFreedom / NovaLabs ↗
TB-500 10mgComing soonUzorak ↗
Wolverine (BPC + TB) 10mgComing soonFreedom / NovaLabs ↗
Wolverine (BPC + TB) 20mgComing soonFreedom / NovaLabs ↗
KPV 10mgComing soonFreedom / NovaLabs ↗

Need a specific certificate? Ask us.