1. A real business
Look for a company name, a registered address and a way to reach a real person. In the UK you can search the Companies House register to check a company exists and see how long it has traded.
2. Certificates for each batch
Every product should have a certificate of analysis tied to a specific batch number, showing purity by HPLC and identity by mass spectrometry. One certificate reused for every batch is not enough.
3. Confirm with the lab
Find the testing lab yourself, not through a link the supplier gives you, and ask whether it issued that report for that sample. A genuine report will check out.
4. How products are presented
A careful supplier uses strict research-use-only wording and makes no health, effect or dosing claims. Claims like that are a legal problem for the seller and a sign the business is not run carefully.
5. Details that match
The batch number on the vial, the certificate and the invoice should all match. The company name should be the same on the website, the payment page and the parcel.
Educational information only. Nothing here is medical advice, dosing guidance or a recommendation to use any substance. Research peptides are not approved medicines and are not for human or animal consumption. Speak to a qualified professional and follow the law where you are.
