About Peptidex — UK Research Peptide Supplier
The UK compound market is full of suppliers who claim high purity but offer no evidence. Peptidex was built to be different — every compound we sell is independently tested by a third-party accredited laboratory or by our suppliers own in house laboratory, and every result is published openly for you to verify.
Every batch in our catalogue has been tested by Janoshik Analytical by our supplier — an internationally accredited third-party laboratory. And by our suppliers independent laboratory. These are published on our Certificates of Analysis page with verifiable reference numbers.
Why it matters: Most suppliers use in-house testing or don't test at all. We use independent accredited labs and supplier in house lab testing — because your research depends on it.
We operate entirely within the United Kingdom. Orders ship from our UK facility within 24–48 hours of payment clearing — no international transit, no customs risk, no weeks of waiting.
Why it matters: Many suppliers ship from China or Eastern Europe. That means 2–4 week delays, customs seizures, and compounds exposed to uncontrolled temperatures during transit. We eliminate all of that.
Compounds degrade at room temperature. From the moment stock arrives from our supplier to the moment it leaves for your lab, our products are held in refrigerated storage at 2–8°C. Our suppliers use insulated packaging with ice packs for all inbound shipments.
Why it matters: Budget suppliers store compounds at ambient temperature to cut costs — compromising stability before you've even received your order. We don't cut that corner.
Our team responds to enquiries within 24 hours during business days. We can't offer medical advice — and we never will — but we'll do everything we can to support your research enquiry with accurate, useful information.
Why it matters: Most suppliers route you to a generic helpdesk that can't answer a single scientific question. We're researchers supporting researchers.
We exist to serve legitimate scientific research. We maintain strict age verification, refuse orders that appear intended for non-research use, and require institutional or research credentials for bulk orders.
Why it matters: Suppliers who turn a blind eye to misuse put the entire industry at risk. We protect the research community by operating with integrity — every time.
The price you see is the price you pay. No handling fees, no card surcharges, no surprise charges at checkout. We accept bank transfer and PayPal — all at the same price.
Why it matters: Many competitors advertise low headline prices then add shipping, processing, and payment fees at checkout. What you see on Peptidex is what you pay.
Peptidex was founded by people who were frustrated with the inconsistent quality and poor service endemic to the compound supply market. Colleagues were receiving degraded products, waiting weeks for shipments, and dealing with suppliers who couldn't answer a basic question about their own stock.
We built Peptidex to be the supplier we wished existed: one that invests in proper cold storage, commissions independent third-party testing, publishes every result openly, and treats researchers with the respect they deserve.
Every decision we make — from our refrigerated storage to our Janoshik testing programme — is guided by one question: "Would we trust this product for our own research?"
Supplier Vetting
We only work with GMP-standard compound manufacturers who provide full documentation, batch records, and supplier COAs before any stock is accepted.
Independent Third-Party Testing & Supplier In House Testing
Every batch has Janoshik Analytical for purity levels, we also work with an accredited supplier who perform in house purity testing giving you peace of mind and full transparency.
Refrigerated Storage
All stock is held at 2–8°C in dedicated refrigeration from arrival to dispatch. Compound integrity is non-negotiable.
Careful Dispatch
Orders are packed securely in protective packaging. What you order is what arrives — intact, labelled, and ready for your research.
Published Certificates of Analysis
Every product links directly to its COA — showing actual purity results with verifiable Janoshik reference numbers. Not theoretical specs. Real data.
All products sold by Peptidex are supplied strictly for scientific research and laboratory use only. They are not intended for human consumption, veterinary use, or any therapeutic application.
We operate in full compliance with UK research chemical regulations. All customers are required to confirm they are qualified researchers aged 18 or over before completing a purchase. We reserve the right to refuse any order that we believe may not be for legitimate research purposes.
Peptidex makes no claims regarding the efficacy or safety of any product for any purpose other than laboratory research. If you have questions about the regulatory status of a specific compound, please consult the relevant UK legislation or contact us directly.
Every compound. Every batch. Published openly.
All Peptidex products are sold strictly for research and laboratory use only. Not for human consumption or veterinary use. Peptidex is the trading name of L&T Bio Synthesis LTD.