Frequently asked questions

Peptide HQ supplies research peptides and related laboratory supplies for scientific and laboratory research use only. All products are intended strictly for in-vitro research and laboratory experimentation — they are not for human consumption.

It means our products are supplied solely for laboratory and scientific research — for example, in-vitro studies and experimental work by researchers. They are not medicines, are not for human or animal consumption, and are not intended to diagnose, treat, cure or prevent any condition.

Research peptides are typically supplied as a lyophilised (freeze-dried) powder, which is more stable for storage and shipping than a liquid. Reconstitution into solution for research work is carried out in the laboratory. See our reconstitution guide for the concentration mathematics involved.

Yes — we stock laboratory supplies such as bacteriostatic water and sterile vials alongside our research peptides.

Concentration is the mass of peptide divided by the volume of solvent added. Our reconstitution calculator does this instantly — enter the mass in the vial and the solvent volume, and it returns the concentration in mg/mL and mcg/mL. It is a concentration tool only.

The research compounds we supply are sold lawfully in the UK as research chemicals for laboratory use only — not as medicines, and never for human consumption. We do not make medicinal claims about any product, and our sales are restricted to research and laboratory contexts.

No. Our products are supplied for laboratory research use only and are not for human consumption. We do not provide any guidance on human use, and nothing on our site should be interpreted as such.

Yes. Our site is age-restricted and sales are limited to adults aged 18/UK 21/USA or over. We also apply regional restrictions to certain compounds where appropriate.

Certain compounds are subject to regional restrictions, so they may not be offered for sale to every market. The available products and prices you see reflect the rules applicable to your region.

A Certificate of Analysis is a document reporting the results of analytical testing on a specific batch of material — confirming its identity and its purity. We explain how to read one in detail in our guide to reading a COA.

Yes. We publish batch Certificates of Analysis on our site, so you can review the documentation for the material before and after purchase.

Purity is independently verified by a third-party laboratory using HPLC (high-performance liquid chromatography), with mass spectrometry confirming the molecular identity of the compound.

Look for batch-specific Certificates of Analysis, independent third-party testing, a verifiable registered company, and clear research-use-only practices with no medical claims. Our supplier guide covers the full checklist.

Reconstitution means dissolving a lyophilised (freeze-dried) peptide powder in a suitable solvent to produce a solution of known concentration for laboratory research. Our reconstitution guide explains the process and the concentration mathematics.

Bacteriostatic water is water containing a small amount of benzyl alcohol, which inhibits bacterial growth. It is a commonly referenced solvent for reconstituting research peptides because a reconstituted solution can be stored for longer without microbial contamination becoming a concern.

Lyophilised peptides are generally stored under cold, temperature-controlled conditions for longer-term stability; reconstituted solutions are typically kept refrigerated and used within a research-appropriate timeframe. We store our peptides under temperature-controlled conditions prior to dispatch.

Orders placed during the day are dispatched 8am the next morning, sent First Class within the UK via Royal Mail. First Class post typically arrives within 1–2 working days after dispatch, though delivery times are ultimately handled by Royal Mail. You'll be able to track your order once it's on its way.

We ship to many countries across the UK, Ireland, and Europe, along with other regions. Certain compounds can only be sent where they are lawful, so availability varies by destination — any product that can't be shipped to your location simply won't be available to order there, and the products shown to you reflect what's available for your region.

Your order arrives as a standard, discreet small parcel — there's no indication of the contents on the outside. Inside, your selected research vials come in branded Peptide HQ packaging, securely packed to protect them in transit

Yes. Our Subscribe & Save option provides a recurring discount on eligible products, with deliveries on a regular schedule. You can manage your subscription from your account.

When you add eligible research compounds together, an automatic bundle discount applies — a larger discount for more compounds in the bundle. The applicable discount is shown clearly as you build your order.

A discount code may be applied to a first subscription order, subject to our discount rules; subsequent renewal deliveries are billed at the standard Subscribe & Save price. Only one code can be used per order.

Discounts don't all combine — generally the most beneficial single discount applies, and our system automatically calculates the best applicable price for your order. Subscribe & Save may combine with one automatic order discount as set out in our terms