Peptide Supplier in the UK

The UK research peptide market has grown rapidly alongside the global incretin and regenerative-medicine literature, but the vendor landscape remains uneven. Most UK research labs evaluating a new supplier weigh four things: documented purity, supply-chain provenance, fulfilment reliability and recourse if a batch fails verification. Peptx is built around all four.

Peptx stock is backed by independent laboratory results, at typically 99%+ purity (HPLC), with a guaranteed minimum stated per compound. Certificates are published openly in the COA Library rather than enclosed with shipments, so you can read the laboratory's report before ordering, not after. If you want your specific batch independently checked, send a sample to one of the labs on our testing page (/testing). We source exclusively from vetted manufacturers (independent lab testing), the same factories that supply many of the world's compounding pharmacies and contract research organisations. Our fulfilment runs from a UK domestic point so there are no customs delays, no import VAT surprises and no border issues.

If an independent lab result shows purity below the product's stated guaranteed minimum, raise it within 14 days of delivery and we review it under our Purity Guarantee. We encourage researchers to commission their own verification and list independent labs on our testing page to make that step straightforward, because a result you commission yourself carries far more weight than a vendor-issued COA.

Peptx ships from a UK domestic fulfilment point. There are no customs forms, no import VAT and no border delays on UK orders. UK Express orders are dispatched within 24 hours of payment confirmation on working days by Royal Mail Tracked 24 and typically arrive 2 to 5 days after dispatch.

• UK domestic fulfilment, no customs or import VAT
• Royal Mail Tracked 24, dispatched within 24 hours
• 24 to 48 hour dispatch from payment confirmation
• Plain unbranded outer packaging, signature on delivery available

Peptx stock is backed by independent laboratory results, at typically 99%+ purity (HPLC); the guaranteed minimum varies by compound. Our suppliers are not chosen on a single rating. We weigh independent lab testing.

Independent laboratories test our material on a rolling programme: random quality-control checks, tests on stock we buy in, and testing as part of vetting every new supplier. Certificates are published openly in the COA Library rather than issued per order, so you can read the laboratory's report before ordering, not after. Independent verification is expanding across the catalogue, with further tests in progress across September and October. If you want your specific batch independently checked, send a sample to one of the labs on our testing page (/testing): a result you commission yourself carries more weight than one handed to you by a seller. Any independent lab result below the product's stated guaranteed minimum purity, or a sealed-vial endotoxin or sterility failure, raised within 14 days of delivery, is reviewed under our Purity Guarantee and, where verified, refunded or re-shipped.

All compounds are supplied as sterile lyophilised powder in sealed vials, packed with desiccant, and stored at controlled temperature throughout the supply chain.

Read our published lab results