Is ProImmune Legit? ProImmune Peptide Brand Review
Is ProImmune legit? ProImmune does not sell peptides to consumers. On September 29, 2026 proimmune.com described an Oxford-area company, founded in 2000, that makes MHC multimers, Ankyron binders and custom peptides and runs immune response assays for research and drug development customers, with a US subsidiary for North America. We note what it publishes and leave the verdict to you.
From its own pages, ProImmune identifies itself unusually fully: ProImmune Ltd with an English company number and VAT number, a head office address near Oxford, ProImmune, Inc. with a Florida address, phone and fax numbers for both, and a published ISO 9001:2015 certificate that names its registrar and expiry date. Its terms of sale are dated PDFs by region and restrict products to non-diagnostic, non-therapeutic use. It does not publish per-lot certificates or name an outside testing lab, and the postcode on its ISO certificate differs from the one on its contact page.
The front page board sells its order by bid, so this ProImmune entry is not a ranking.
What proimmune.com publishes today (checked September 29, 2026)
ProImmune is an immunology reagents and contract assay company that sells custom peptides as one line, so its paperwork is written for laboratories and drug developers. The rows record proimmune.com on September 29, 2026.
| Item | What we saw | Page |
|---|---|---|
| Research-use statement | Terms of sale (ProImmune, Inc. PDF): the customer “shall not use the Products and results of the Services for any diagnostic or therapeutic use in humans or animals”. | Terms of Business, Inc. terms PDF |
| Certificates or testing page | A Quality page states ISO 9001:2015 certification for the design, manufacture and sale of standard and custom immunological reagents and services, and links the certificate PDF. No per-lot certificates are published on the pages we loaded. | Quality, ISO certificate PDF |
| Named testing lab | No outside lab; the company runs its own assays. The certificate is issued by URS (United Registrar of Systems), number 35954/A/0001/UK/En, first issued August 17, 2009, current cycle expiring August 16, 2027. | ISO certificate PDF |
| Contact route | [email protected], UK main office +44 (0)330 139 0000, US +1 888 505 7765, separate fax numbers, an Asia-Pacific line with WhatsApp open 0830 to 1730 GMT+8, a quote request form and a distributor list. | Contact Us |
| Shipping policy | No retail shipping page. The custom peptide page gives typical dispatch times of about three weeks for lower purity grades and about four weeks for higher ones. | Custom peptides page |
| Refund or returns policy | No consumer returns page. The Inc. terms give a 30 day window, from delivery, to give written notice that a service does not conform; the company then either corrects it or credits the price. Either party may end a contract on 30 days' written notice. | Inc. terms PDF |
| Company name or address | ProImmune Ltd., 5 Oasis Park (Limbrook), Stanton Harcourt Road, Eynsham, Oxford, OX29 4GP, UK, registered in England, company no. 387 33 86, VAT reg. no. 749 90 53 87. ProImmune, Inc., 4281 Express Lane, Suite L2378, Sarasota, FL 34249-2602. The ISO certificate gives the UK postcode as OX29 4TP. | Contact Us, ISO certificate PDF |
| Product range | MHC class I and II multimers, Ankyron binders for more than 3000 targets, custom peptides and peptide pools, antibodies, and contract assays for immunogenicity, T cell and B cell responses and HLA typing. Founded in 2000 by Dr Linda Tan and Dr Nikolai Schwabe. | Home, About ProImmune |
Put simply, proimmune.com gives a buyer a good deal of checkable identity: a UK company number, a VAT number, two operating companies with addresses and phones, and a quality certificate with a registrar, a number and an expiry date. Its terms are written for business customers and are clear that products are not for diagnostic or therapeutic use. What it does not give is batch paperwork in public; custom peptides are quoted and made to order, so the data comes with the order, not before it.
Reading the public signals
The identity signals here are strong and specific. An English company number can be looked up on the UK public register, the VAT number can be checked, and the ISO certificate names its registrar and states how to query it. That is the kind of record a university purchasing office or a biotech buyer would want to see.
The limits follow from the business model. ProImmune's peptides are made to order in purity grades with dispatch times of weeks, not sold off a shelf, and the site does not show a sample analytical report. The ISO certificate covers how the company runs its quality system, not the result for any batch, so the certificate of analysis for your order is still the thing to ask for.
One small mismatch is worth noting: the contact page gives the head office postcode as OX29 4GP, while the ISO certificate lists OX29 4TP. It may be a typing slip on either document, but it is the kind of detail to settle if your organisation's supplier checks require an exact address.
Applying the checks to ProImmune
- Check the company number. Search 03873386 on the UK Companies House register and compare the registered name and address with the contact page.
- Confirm the ISO certificate. Certificate 35954/A/0001/UK/En was issued by URS; the certificate itself says to contact URS if in doubt.
- Ask what data ships with a custom peptide. Request the analytical report format, such as HPLC and mass spectrometry, before you approve a quote.
- Diary the 30 day notice window. Under the Inc. terms, a problem with a delivered service must be notified in writing within 30 days.
For how to read the analytical report on a custom order, see our peptide COA guide.
FAQ
Is ProImmune legit?
We do not give that label. On September 29, 2026 proimmune.com named ProImmune Ltd near Oxford with an English company number and VAT number, a US subsidiary in Sarasota, Florida, phone lines for both, dated terms of sale, and an ISO 9001:2015 certificate from URS valid to August 16, 2027. It sells to research and industry customers, not consumers.
Does ProImmune publish third party testing?
It publishes a third party quality certificate, ISO 9001:2015 from URS, which covers its management system rather than any batch. We found no per-lot certificates or outside testing lab on its public pages; custom peptides are made to order, so ask for the analytical data that will ship with your order.
Is ProImmune ranked on the BestPeptideBrand board?
No ranking comes from this review. The board lists paid placements by bid amount, and our reading of ProImmune's company and quality pages does not affect it.
Sources
Every page below was loaded on September 29, 2026 with a standard browser request.
- ProImmune home page (www.proimmune.com), checked September 29, 2026
- About ProImmune (www.proimmune.com/about-proimmune), checked September 29, 2026
- Contact Us (www.proimmune.com/contact-us), checked September 29, 2026
- Quality (www.proimmune.com/quality), checked September 29, 2026
- ISO 9001:2015 certificate (PDF) (www.proimmune.com/wp-content/uploads/2025/10/ISO-9001-2015-Certificate-Limbrook.pdf), checked September 29, 2026
- Terms of Business (www.proimmune.com/terms-of-business-2), checked September 29, 2026
- ProImmune, Inc. terms and conditions of sale (PDF) (www.proimmune.com/wp-content/uploads/2021/02/FRM_SM0209C_V2.2-TC_PIINC.pdf), checked September 29, 2026
- Custom peptides page (www.proimmune.com), checked September 29, 2026
Independent transparency review built from the public pages listed under Sources, loaded on September 29, 2026. ProImmune has no relationship with this site unless it holds a listing on our board, which is paid placement ordered by bid amount only. This page asserts no wrongdoing and makes no purchase recommendation. Nothing here is medical advice. Corrections: see the site contact page.