Frequently asked questions

No. Every product listed on this site is supplied strictly for in-vitro laboratory research and analytical reference use by qualified personnel. Mercia Research peptides are not pharmaceuticals, are not licensed for therapeutic use, and must not be administered to humans or animals. Any other use falls outside the terms under which the products are supplied.

Every lot is tested for purity by HPLC and confirmed for identity by mass spectrometry. Our standard target is ≥99% peptide purity (with a few cosmetic and antioxidant compounds released at ≥98%). We do not release any batch that fails an assay, and the actual measured purity for the lot you receive is detailed on the third-party tested Certificate of Analysis available on our website.

Yes. Every batch is third-party tested and lot-matched to the CoAs available on our website. The Certificate of Analysis summarising HPLC purity, mass spectrometry identity, lot number, manufacturing date, and recommended storage conditions. The lot printed on the cartridge matches the lot on the CoA — full provenance, no guesswork.

Yes. All research peptides are released against a Limulus amebocyte lysate (LAL) endotoxin specification appropriate for in-vitro and pre-clinical research handling. Endotoxin results for the relevant lot are summarised on request alongside the CoA.

Our compounds are produced by UK-based contract manufacturers using audited solid-phase peptide synthesis (SPPS) processes operating to a documented quality system. Final release testing — purity, identity, endotoxin where applicable — is performed in the UK before any product is offered for sale.

Mercia Research supplies research materials in both liquid peptide solution and lyophilised peptide formats, depending on the compound. Liquid peptide solutions are provided in sealed 3 mL research cartridges, while selected compounds may be supplied as lyophilised powder in laboratory vials. All materials are prepared under controlled manufacturing and quality-control procedures. Batch-specific analytical documentation, including a lot-matched Certificate of Analysis (CoA), is provided to support identity, purity, and traceability requirements.

Browse the catalogue, choose a product and quantity, add to cart and check out. You will receive an order reference and an emailed confirmation the moment the order is recorded in our system.

We accept open banking payments via Fena, which connects directly to your bank. Bank transfer is also available for institutional orders by request. If you have any difficulty at checkout please contact us at info@merciaresearch.com and we will help.

No. You can order a single cartridge if that is what you need. There is no minimum order value.

Yes. All product prices, shipping and totals on Mercia Research are quoted in pounds sterling (GBP, £). Your bank statement will reflect the same GBP amount.

Yes, for verified academic and commercial research institutions. Contact us at info@merciaresearch.com before placing the order with your institutional purchase order or research-group details and we will arrange tiered pricing.

You can request a modification or cancellation while the order is in the "Received" or "Processing" state on the tracking page. Once the order moves to "Packed" it can no longer be cancelled.

All orders ship from our UK fulfilment partner.

Shipping is £15.00 within the UK. Orders over £300 ship free. International rates are calculated at checkout and depend on destination and carrier.

Orders placed Monday to Thursday are typically dispatched the next business day via Royal Mail Tracked 24. Orders placed on Friday, Saturday, or Sunday are dispatched from Monday to help maintain appropriate temperature controlled shipping conditions during transit. Most UK mainland orders are delivered within 1–2 business days following dispatch. Delivery times for international orders typically range from 2–5 business days, depending on destination, customs processing, and local carrier performance. Order status and tracking information can be viewed at any time via the Order Tracking page.

All orders are dispatched in plain outer packaging with just delivery address and the carrier label. Products requiring refrigerated storage are dispatched in validated temperature-controlled packaging designed to maintain recommended transit conditions and support product stability and quality during delivery.

We ship to most jurisdictions where the import of research-grade peptide reference compounds is permitted by local law. We do not ship to countries where these compounds are restricted. It remains the customer's responsibility to ensure the compound is legal to import for research use at the destination.

In the rare event that an international shipment is refused entry or seized by customs, we will issue you a full refund. Please contact us at orders@merciaresearch.com with your order reference and we will resolve it promptly.

UK orders include UK VAT in the displayed price. International orders are shipped DDU — any import duties, taxes or clearance fees levied at the destination are the recipient's responsibility and are not included in our shipping charge.

Due to the temperature-sensitive nature of our research materials and the requirement to maintain controlled conditions, products cannot normally be returned once dispatched. If you wish to cancel an order, please contact us as soon as possible. Orders may be cancelled prior to dispatch and a full refund will be issued. Where products are received damaged, defective, incorrectly supplied, or not in accordance with the order confirmation, please contact us within 48 hours of delivery and we will investigate the matter promptly. Nothing in this policy affects your statutory rights under applicable UK consumer protection legislation.

Photograph the parcel and any visible damage on receipt and email us at orders@merciaresearch.com within 48 hours. If a cartridge is compromised, we will replace it free of charge or issue a full refund for the affected line including shipping.

We stand behind every lot. If your independent analytical work shows the lot does not meet the specification stated on the Certificate of Analysis, send us your analytical data at orders@merciaresearch.com and we will investigate, replace the lot, or refund — depending on the outcome.

Refunds are issued back to the original payment method within 5 business days of approval. Shipping is non-refundable unless the issue is on our side (damaged shipment, lot recall, or shipping error).

Store cartridges at 2–8°C (standard refrigerator temperature) immediately upon delivery. Keep away from direct light and do not freeze. When stored correctly, cartridges remain stable up to 12 months from the date of manufacture unopened.

No. All Mercia Research liquid peptide cartridges are supplied as pre-mixed liquid solutions — no reconstitution is required. The cartridge is ready to load upon delivery.

No. Do not freeze the liquid peptide cartridges as this may compromise the stability and effectiveness of the peptide solution. Keep refrigerated at 2–8°C at all times.

Once in use, cartridges should be stored correctly at 2–8°C and protected from direct light. The shelf life from manufacture is up to 12 months — the exact date appears on your CoA.

Yes — straightforwardly and unambiguously yes. Research peptides are legal to purchase, possess and import in the UK for research purposes only. Our products are labelled for research use only, which is the standard regulatory framework under which research compounds are supplied in the UK. Buying from a UK-registered company means your purchase is made entirely within UK law with no import complications for domestic orders.

Customers must be qualified researchers, laboratory professionals, or institutional buyers aged 18 or over who can confirm the products will be used solely for in-vitro research, analytical reference, or non-human pre-clinical applications. By placing an order you certify these conditions.

No. Mercia Research is a supplier of laboratory reference compounds. Our team does not, and cannot, provide dosing guidance, treatment recommendations, or any form of medical advice. Questions about clinical effect, side-effects, or therapeutic use should be directed to a registered medical professional.

SDS availability is currently being confirmed with our manufacturer. Please email info@merciaresearch.com if you require an SDS for site safety documentation.

We are happy to complete reasonable supplier-verification or material-handling forms required by university procurement or institutional safety teams. Email the form to info@merciaresearch.com with your order reference and we will return it within 2 business days.

In the unlikely event we identify a quality concern with a lot already shipped, we will contact every customer who received that lot directly by email, withdraw remaining stock from sale, and replace or refund the affected cartridges at our cost. Lot traceability is built into every order.

No — checkout works as a guest with your email address. Your order reference and tracking link are emailed to you and you can revisit them at any time from /track. Institutional accounts with saved billing details are available on request.

Mercia Research processes personal data such as your name, email address, delivery details, and order history solely for the purposes of order fulfilment, customer support, account administration, and compliance with applicable legal obligations. We do not sell personal data to third parties and do not use customer information for third-party advertising purposes. Where you have consented to receive marketing communications, you may unsubscribe at any time using the unsubscribe link included in our emails or by contacting us directly. Personal information is handled in accordance with UK GDPR and the Data Protection Act 2018. Further details, including information on data retention, your privacy rights, and how to exercise them, can be found in our Privacy Policy.

No. Payments are processed via open banking through Fena and we never store or transmit raw bank details ourselves. We only retain your order reference and amount for our records.

To request deletion of your personal data, please email orders@merciaresearch.com from the email address associated with your account and include your order reference where available. We will review and process your request in accordance with UK GDPR and applicable data protection laws. Where legally permitted, personal data associated with your account will be deleted or anonymised. Certain information may need to be retained where required to comply with legal, accounting, tax, fraud prevention, or regulatory obligations. For further information about your privacy rights and how we process personal data, please refer to our Privacy Policy.

No marketing emails are sent without explicit opt-in. The only emails you will receive automatically are order confirmation and status-update notifications tied to your shipment.

If you have not found the answer you are looking for, please visit our Contact page and we will get back to you within one business day.