Every production lot is independently verified to exceed 99% purity through reversed-phase HPLC with UV detection at 214nm or 220nm. The reported purity percentage reflects the target peak area relative to all detected peaks. Full analytical data — including the chromatogram — is published directly on each product page before you order.

All analytical testing is carried out by accredited third-party UK laboratories operating under ISO/IEC 17025 standards. We do not perform in-house testing on lots intended for sale — this separation ensures complete objectivity in every result we publish.

Each product listing includes a Certificate of Analysis (COA) covering HPLC purity, mass spectrometry confirmation, endotoxin levels, and moisture content where applicable. Batch-specific COAs are available to download directly from the product page.

Every new batch is cross-validated against the previous lot via mass spectrometry before it is released. We maintain archived reference samples for each peptide so any deviation in molecular weight, sequence, or purity can be identified and quarantined before it reaches customers.

Orders placed before 2pm on business days are dispatched the same day. Orders placed after the cut-off or over the weekend are shipped the next working day. You will receive a tracking number by email as soon as your parcel is collected.

We offer standard tracked delivery and next-day courier options at checkout. All peptide orders are shipped in insulated packaging with cold packs to maintain integrity during transit, regardless of the shipping tier selected.

Currently we ship within the United Kingdom only. International shipping is something we are actively working toward. If you are based outside the UK, please contact us to be notified when your country becomes available.

Orders can be cancelled before dispatch with a full refund. Due to the nature of research compounds, we are unable to accept returns on opened or used products. If an item arrives damaged or the wrong product is sent, please contact us within 48 hours and we will arrange a replacement or refund.

Lyophilised peptides should be stored at -20°C in a sealed container away from moisture and direct light. Under these conditions most peptides remain stable for 24 months or longer. Avoid repeated freeze-thaw cycles once reconstituted.

In lyophilised form, stored correctly at -20°C, most of our peptides carry a minimum 24-month shelf life from the date of manufacture. The specific expiry for each lot is stated on the vial label and in the accompanying COA.

Once reconstituted, peptide solutions should be stored at 4°C and used within 7–14 days depending on the peptide. For longer-term storage, aliquot into single-use volumes and freeze at -80°C. Always reconstitute using sterile bacteriostatic water or the solvent specified in the product documentation.

All products sold by Strata Peptides are supplied strictly for in-vitro laboratory research and analytical purposes. They are not intended for human or animal administration, clinical use, or as food supplements. By purchasing you confirm you are a qualified researcher operating within applicable regulations.

No. Our products are research-grade compounds and are not licensed, approved, or intended for human or veterinary use. They have not been evaluated by the MHRA, FDA, or any other regulatory authority for therapeutic purposes.

We operate as a supplier of research chemicals and analytical reference standards under UK law. Our peptides are not controlled substances, are not scheduled under the Misuse of Drugs Act 1971, and are lawfully sold for legitimate scientific research within the United Kingdom.

Our products are intended for purchase by researchers, scientists, and laboratory professionals aged 18 and over. By placing an order you confirm that you are procuring these compounds for lawful research purposes and that you understand and accept the research-only terms of sale.

You can reach us via the Contact page on our website or by emailing hello@stratapeptides.co.uk. We respond to all enquiries within 4 hours on business days. For technical questions about specific peptides, please include the product name and batch number from your order.

We do not currently offer custom peptide synthesis directly. However, we can refer you to trusted synthesis partners we work with. For analytical queries such as third-party verification of existing compounds, please contact us to discuss your requirements.

We do not provide dosing or administration advice as our products are for research use only. We do not supply syringes, needles, or any administration equipment. For laboratory reconstitution guidance, refer to the handling notes on each product's COA.