Question 1

How long does delivery take?

Accepted Answer

Orders placed before 2pm are shipped the same working day via tracked next-day courier within the UK.

Question 2

When are orders dispatched?

Accepted Answer

Monday to Friday, excluding UK bank holidays.

Question 3

Will I receive tracking?

Accepted Answer

Yes — every order is sent with Royal Mail or DPD tracking and you'll receive the tracking number by email as soon as the parcel is collected.

Question 4

What if my order hasn't arrived?

Accepted Answer

Get in touch with our team within 14 days of dispatch and we'll resolve it the same working day.

Question 5

Do you ship internationally?

Accepted Answer

At the moment we ship within the UK only. International shipping is on our roadmap — sign up to our newsletter to be notified when it goes live.

Question 6

What if my product arrives damaged?

Accepted Answer

Email us your order number, a clear photo of the damage and a short description of the issue. We'll arrange a replacement as quickly as possible.

Question 7

Can I place a bulk order?

Accepted Answer

Yes. We offer bulk pricing for researchers, clinics and laboratories. Send us the products and quantities you need and we'll come back to you with pricing and lead times.

Question 8

Which payment methods do you accept?

Accepted Answer

We accept all major credit and debit cards, Apple Pay and Google Pay at checkout.

Question 9

Is checkout secure?

Accepted Answer

All transactions are PCI-compliant and processed with end-to-end encryption. Card details are never stored on our servers.

Question 10

Do you offer subscriptions?

Accepted Answer

Yes — save 10% on recurring monthly deliveries. You can pause, edit or cancel from your account at any time.

Question 11

Do you provide a Certificate of Analysis (CoA)?

Accepted Answer

Yes. Every batch ships with an in-house CoA showing HPLC purity and identity confirmation. Batch-specific CoAs are also available on each product page.

Question 12

What is the difference between peptide purity and peptide yield?

Accepted Answer

Purity is the proportion of the target peptide compared to all related species, measured by HPLC — a purity of 98% means 98% is the correct sequence and 2% are related impurities. This is the main quality metric. Yield is the total mass recovered from a synthesis run after purification — a manufacturing figure, not a quality indicator. We specify our products by purity, not yield, and yield figures are not published.

Question 13

Why does a 5mg vial appear nearly empty? Can it be verified by weight?

Accepted Answer

This is completely normal. 5mg is a tiny amount of material — roughly a few grains of fine salt — and in a standard 2ml or 3ml vial it will look like a thin film, a small disc, or barely-visible powder at the bottom. Weighing the vial isn't a reliable check: lab balance tolerances often exceed the peptide mass at this scale, the glass, stopper, crimp seal and residual moisture dwarf the peptide weight, and tare weights vary vial-to-vial even within the same batch. The proper way to verify content is analytical testing (HPLC or mass spectrometry) — see the CoA on each product page. If you have a concern about a specific vial, send us the order reference and photos and we'll look into it.

Question 14

Why does my vial appear different or lack a vacuum seal?

Accepted Answer

Minor cosmetic differences between vials are normal and don't indicate a quality issue. The freeze-dried cake can range from a compact disc to a looser powder, and cap colours sometimes differ between batches. Not every vial is sealed under vacuum — some are nitrogen-flushed instead, depending on the manufacturer and the peptide. Vacuum or no vacuum, quality and purity are unaffected provided the vial has been stored correctly (sealed, refrigerated, away from light). If something looks wrong — a broken seal or visible contamination — send us photos and we'll investigate.

Question 15

What vial sizes are available?

Accepted Answer

Vial sizes and peptide quantities vary by product and are listed on each product page. Common sizes are 2mg, 5mg, 10mg and 15mg, with some products available in larger quantities. All vials are laboratory-grade borosilicate glass with crimped aluminium seals and rubber stoppers. If you need a quantity that isn't listed, let us know.

Question 16

How should peptides be handled and stored?

Accepted Answer

Proper handling keeps peptides in good condition. Temperature: store freeze-dried peptides at 2–8°C (fridge) for short-term use, or -20°C (freezer) for long-term storage. Light: keep away from direct light — UV can degrade tryptophan and tyrosine residues in particular. Moisture: keep vials sealed until use, as freeze-dried peptides absorb moisture from the air, accelerating degradation. Handling: let refrigerated or frozen vials reach room temperature before opening to prevent condensation forming inside. After reconstitution: aliquot into single-use volumes where possible and store frozen, avoiding repeated freeze-thaw cycles. Treat all products as research chemicals in line with your institutional safety guidelines. MSDS sheets are available on request.

Question 17

Where are your products made?

Accepted Answer

Synthesised in audited UK facilities to strict quality and research standards, and independently tested by a third-party laboratory before release.

Question 18

Are your products legal in the UK?

Accepted Answer

Yes — all products are supplied strictly as reference compounds for in-vitro laboratory research and are not classified as medicines. They are not for human or animal consumption.

Question 19

Do you make medical claims?

Accepted Answer

No. Our products are research compounds and are not intended to diagnose, treat, cure or prevent any disease.

Question 20

How do I contact you?

Accepted Answer

Email info@oxfordresearchpeptides.com and a member of the team will get back to you within one working day.

Question 21

Do you accept returns?

Accepted Answer

Due to the nature of our products we are unable to accept returns. We will, however, resolve any issue with your order promptly.

Question 22

Do you issue refunds?

Accepted Answer

Refunds are handled on a case-by-case basis by our customer service team. When requesting a refund, please include your order number, a description of the issue and any supporting photos.

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