About PepSynex

Built around a single principle: prove it.

PepSynex supplies lyophilized research peptides to laboratories, universities and independent researchers. We exist because the research-chemical market runs on trust we believe should be earned with data — so every lot we release is backed by an independent Certificate of Analysis.

≥98%
HPLC purity threshold
100%
Lots third-party tested
HPLC + MS
Methods on every batch
12+
Research compounds

Transparency as the product, not the marketing.

PepSynex was founded by a small group of analytical chemists and laboratory-supply professionals who were tired of ordering research material that arrived with no documentation, no batch traceability, and no way to confirm what was actually in the vial.

So we built the company we wanted to buy from. Every PepSynex lot is assigned a unique batch number, tested by an independent third-party laboratory, and published with a full Certificate of Analysis that anyone can look up before or after purchase. No gated documents. No “contact us for purity data.” The proof is on the page.

We are a supplier of research reagents only. We make no claims about therapeutic use, and we never will — our entire value proposition is that you can verify exactly what you received and decide for yourself.

What guides us

Four pillars on every batch

These aren’t slogans — each one maps to a concrete step in how we source, test and ship.

Purity

A ≥98% HPLC release threshold on every lot, with the measured value printed on its COA.

Transparency

Full certificates published openly and searchable by batch — no logins, no gatekeeping.

Verification

Identity and purity confirmed independently by HPLC and mass spectrometry, lot by lot.

Discretion

Plain secure packaging and privacy-first order handling, from checkout to doorstep.

Our documented quality process

Six checkpoints, every lot

A traceable chain from raw material to your bench — documented at each step.

1

Sourcing & intake

Raw material is received against a documented supplier record and held in quarantine pending checks.

2

Lot assignment

Each production lot receives a unique batch number tied to its raw materials and handling history.

3

HPLC purity

High-performance liquid chromatography quantifies purity against the ≥98% release threshold.

4

MS identity

Mass spectrometry confirms molecular mass matches the expected sequence for the compound.

5

Lyophilization & fill

Material is freeze-dried and filled under controlled conditions, then labelled with its batch number.

6

COA published & released

The signed third-party certificate is published to our Verify page and the lot is cleared for sale.

Facility & standards

Controlled handling, traceable records.

PepSynex material is handled in temperature-controlled, access-restricted storage with documented chain-of-custody. Our analytical partners operate to recognised laboratory quality-management practices, and every released lot retains its raw chromatography and spectrometry data on file for reference.

Cold-chain storage
Lyophilized material held in controlled, monitored conditions to preserve integrity.
Third-party labs
Independent analytical partners we don’t own — no internal pressure on results.
Batch traceability
Unique lot numbers link each vial to its raw materials and analytical record.
Data retention
Raw HPLC and MS data retained on file so any certificate can be substantiated.
Who you’re working with

People behind the process

Reach the right desk directly. Role-based contacts ensure your question lands with the team that owns it.

EM
Head of Quality
Dr. Elena Marsh

Owns the testing programme, release thresholds and the relationship with our third-party laboratories.

info@pepsynex.com
DO
Lab Operations Lead
David Okonkwo

Oversees lot assignment, lyophilization, fill and the chain-of-custody records behind every batch.

info@pepsynex.com
SL
Customer & Bulk Support
Sarah Lindqvist

Handles orders, documentation requests, batch look-ups and bulk / wholesale enquiries.

info@pepsynex.com

For Research Use Only (RUO). PepSynex supplies research reagents for laboratory research use only. Nothing on this page describes safety, efficacy, or suitability for any in-vivo, human, or veterinary application. All products are sold strictly as research chemicals and are not intended for human or veterinary use, diagnosis, treatment, or consumption. Not a drug or dietary supplement. No statement on this site has been evaluated by the FDA.