Frequently asked questions

A Certificate of Analysis is a document issued by a testing laboratory that reports the results of analytical tests on a specific batch of material — typically identity (by mass spectrometry), purity (by HPLC), and sometimes water content, counter-ion and other attributes. See our article on how to read a COA for a plain-English guide to each section.

Each identifier carries its own status. Values marked Verified have been checked by an administrator against the stated data source (usually PubChem). Values marked Pending have been entered but not yet checked and should be treated as provisional. Catalogue cards mark pending values with an asterisk.

Yes. We supply research peptides to laboratories, researchers and organisations in the UK and worldwide. Orders are placed by enquiry rather than an online checkout: use the contact form with the compound and quantity you need, and our team will confirm availability, documentation and dispatch. Supply is for laboratory research use only.

We aim to respond to technical and documentation enquiries within two working days (Monday to Friday, UK time).

Positive Peptides is based in Surrey, in the south-east of England. We supply research peptides, with documentation and technical support, to laboratory professionals and organisations in the United Kingdom and worldwide.

Yes. Orders are dispatched from Surrey, UK to laboratories and organisations worldwide. International dispatch is subject to the import regulations of the destination country, which remain the recipient's responsibility. Supply is for laboratory research use only.

Yes, please do. Use the contact form and select “Scientific references or corrections”. Include the DOI or PubMed ID where possible. Suggested citations are added as pending and verified before publication.

No. All compounds are described strictly for in-vitro laboratory research. They are not approved for human or veterinary use, and we make no claims of safety or efficacy. We do not provide dosing, administration or reconstitution guidance and will not respond to requests for it. See the Research Use Disclaimer.

Several compounds (for example semaglutide and tirzepatide) exist as licensed pharmaceutical products with clinical-trial evidence. That evidence concerns the regulated medicine, manufactured to pharmacopoeial standards and used under medical supervision. It does not apply to research-grade material and does not alter the research-use-only basis of this website.

No. A disclaimer describes the basis on which information is provided; it does not change the law. Rules on the purchase, possession, import and use of research compounds vary between countries and institutions, and it is your responsibility to comply with those that apply to you.

Our research peptides are supplied at 99% purity, measured by HPLC, with identity confirmed by mass spectrometry. Laboratory documentation for the batch supplied is available with your order on request — ask when you enquire.

Named administrators with access to the editorial dashboard. Every verification and change is recorded in an audit log with the administrator's identity and time. Our full editorial and verification standards are described on the Our Standards page.

Public pages set no cookies. The only cookies on the site support administrator sign-in. If analytics is enabled it is a cookie-free, privacy-conscious service. See the Cookie Policy.

Where no product photograph has been uploaded, the page shows a decorative graphic generated from the compound name. It is not a structural depiction of the molecule and should not be read as one. Verified structural information is given in the identifiers section.