Your research supplier closed. Here is how to check the next one.
Several well-known research peptide suppliers have closed or stopped selling over the past two years. If yours was one of them, the next supplier you choose should prove quality, not just promise it. These five checks take about ten minutes.
1. Does the supplier publish lot-specific certificates?
A certificate of analysis (a lab report on a specific production lot) should show the product, a lot or report number and the date tested. A generic "99% pure" banner is not a certificate.
2. Is the lab named, and is it an independent lab?
Look for the testing lab's name on the report. An unnamed or in-house "lab" is a red flag.
3. Does the report name the method and the results?
A lab report names the analytical method (for example HPLC) and shows the results measured on the tested sample, not just a banner number on a product page.
4. Is the coverage honest?
No supplier has a fresh report for everything at all times. A trustworthy supplier tells you which products are covered and which are pending.
5. Where does it ship from?
Orders shipped from overseas can sit in customs for weeks. If you need a predictable delivery, check where stock actually ships from.
Quick red-flag list
- No lab name, no lot or report number, no date
- No analytical method or results shown
- Website copy that suggests personal use of "research use only" products
- A lookalike domain - check you are on the real site before you pay