Purity is stated clearly on product listings, with supplier documentation logged against batches where it is provided. Independent laboratory reports for Retatrutide and GHK-Cu are published in full, with both samples returning 99% purity by HPLC.
Six Pillars
Every aspect of how we source, store, document and dispatch is designed for one purpose: making research supply clearer before an order is placed.
Independent HPLC reports for Retatrutide and GHK-Cu are published in full; every other listing shows the purity stated by the supplier. Supporting documentation can be requested by product name where we hold it.
All stock is held in the UK, not shipped from overseas after ordering. This means no international customs delay, no extended transit at uncontrolled temperatures, and reliable dispatch timelines for UK researchers.
Lyophilised peptides are kept frozen from arrival until order picking. Insulated foil packaging with gel packs is available as a paid checkout option for customers who require additional thermal protection in transit.
Peptides in lyophilised form are stable over longer periods when stored correctly. We maintain -20°C cold storage and do not keep stock at ambient temperature. Batch rotation is managed to ensure freshness of supply relative to manufacture date.
Orders are dispatched within 24–48 hours of confirmed payment on business days. Shipping options include Royal Mail Tracked 48, Tracked 24 and DHL Express. All orders are packed discreetly with no external branding.
Questions before ordering are answered directly and without a sales script. We will tell you clearly which product fits your research requirement, or if we do not currently stock what you need. Post-order support on dispatch, tracking and COA requests is handled by the same contact.
Transparency
What we commit to on every order.
| Standard | North Peptides UK |
|---|---|
| Purity disclosure | ✓ Stated on every listing; independent HPLC reports published for Retatrutide and GHK-Cu |
| Stock location | ✓ Held in the UK; nothing re-exported after order |
| Storage | ✓ -20°C from arrival until dispatch |
| Dispatch | ✓ Orders before 12pm Mon–Fri aimed at next-working-day dispatch |
| Batch traceability | ✓ Batch numbers recorded on arrival |
| Support | ✓ Direct answers by email, Telegram or WhatsApp |
End-to-End
Here is the complete chain of custody for every product we supply - from sourcing through to delivery.
Products are sourced exclusively from established manufacturers with documented quality management processes. We do not purchase from intermediary brokers or resellers without manufacturer traceability.
On arrival, batch references and available supplier documentation are logged against the product record. If a researcher requests documentation, support can confirm what is currently held for that batch.
All stock is placed into -20°C cold storage immediately on arrival. Products do not sit at ambient temperature. Cold storage is monitored and batch rotation is managed by manufacture date to prioritise freshness.
Products are removed from cold storage at the point of order picking only. Optional thermal cooled packaging can be added at checkout. Outer packaging is plain and discreet with no product identification externally.
Orders are dispatched within 24–48 hours of confirmed payment on business days. Royal Mail Tracked 48, Tracked 24 and DHL Express options are available. Tracking details are provided at dispatch.
Documentation requests, tracking queries and post-order support are handled via email and Telegram. We reply with the supplier documentation currently held for the relevant product.
Support
If you have a question before ordering - about which product fits your research requirement, whether a particular variant is in stock, or what documentation is currently held - contact support directly. You will get a clear, factual answer.
Post-order support covers: tracking updates, COA requests by batch reference, delivery issues, and product questions. The same contact handles everything.
Ready to Order
Browse the full catalogue of UK-stocked research compounds with stated purity, secure bank transfer checkout, tracked dispatch, and direct support.