Official action / O-047
How to report a suspicious peptide seller or product
Seller reports and reaction reports are different. Use the MHRA seller service for possible illegal online supply and Yellow Card for a medicine problem.
Use the MHRA suspicious seller service when a website or social-media account may be offering medicines or medical devices illegally. Save the URL, claims, screenshots, product photographs and transaction records. Anyone can report, including anonymously. Use Yellow Card instead for a suspected reaction or medicine problem.
Prepare and submit the report
- 1
Save the seller's URL
Record the website, marketplace page or social-media profile before it changes.
- 2
Capture the claim
Keep screenshots showing product names, health claims, research disclaimers, prices and contact details.
- 3
Keep transaction evidence
Save receipts, payment records, emails, messages, packaging and photographs.
- 4
Submit the MHRA report
Explain why you suspect illegal supply or a fake or unauthorised product. Anonymous reports are allowed.
- 5
Use Yellow Card when needed
Make a separate medicine-problem report for a suspected reaction, defect or falsified product.
Evidence to save
- Website address or social-media handle and the date viewed.
- Product page, claims, instructions and research-use-only wording.
- Seller name, phone number, email and payment details where available.
- Order confirmation, receipts, messages and delivery records.
- Photographs of the product, label, batch and packaging.
- Any certificate or test document the seller supplied.
Do not make another purchase, engage the seller or handle an unsafe product to collect more evidence.
Seller concern or medicine problem?
Report the seller
Possible illegal sale, unauthorised product, misleading website or suspicious social-media supply belongs in the MHRA seller-reporting service.
Report the product or reaction
Suspected side effects, defects and fake healthcare products can be reported through the Yellow Card route for reactions instead.
How we preserve a reportable record
Our seller records separate captured evidence from inference. We preserve the seller's own wording, URL and date, then link the relevant UK rule or official alert. We do not label a named business illegal without an official finding.
Suspicious seller questions
Can I report a seller anonymously?
Yes. The MHRA suspicious seller service states that anyone can report an online seller and may do so anonymously.
What information do I need?
You need the reason for your concern and information about the seller, such as the website or social-media URL. Product photographs, screenshots, messages, receipts and contact details can also help.
Should I use this route for side effects?
Use Yellow Card for a suspected side effect, defective medicine or fake healthcare product. Use the suspicious seller service for possible illegal online supply. A concern may require both reports.
Will the MHRA tell me whether a seller is legal?
The reporting service collects intelligence for assessment and enforcement. It is not a personal legal-advice service or a guarantee that the MHRA will provide an individual outcome.
Official sources
- MHRA suspicious online seller serviceAccessed 7 August 2026
- MHRA borderline products guidanceAccessed 7 August 2026
- the regulatory basis for reportingAccessed 7 August 2026
Editorial experience
From our work: how we checked this page
For topical-map item O-047, How to report a suspicious peptide seller or product was checked as a distinct editorial task, not treated as a generic peptide page. We reviewed 2 unique external sources and 4 internal destinations in the page, then checked that the opening answer, headings, source descriptions and linked next steps stayed within the same claim boundary. The count records links in the published page and is not a claim that every source carries equal evidential weight.
Yianni Kiromitis checked the page against its mapped purpose, verified the cited sources, reviewed the internal routes and approved the final wording as Lead Author, Publisher and Managing Editor. This page does not carry a specialist review credit because its publication decision did not require a scientific or clinical conclusion beyond the named material it links to.
We did not use patient experience, a personal treatment outcome, seller testimony or an assumed product identity to support this page. The publication did not independently test a vial for this review. Where a page refers to a laboratory result, that result applies only to the named sample, method and attribute. We kept uncertainty beside the conclusion, recorded which source supports each material claim, and checked that the visible review date matches the publication record. A new controlled study, regulator update, corrected source, analytical report or credible safety signal can trigger reassessment through the public correction route.