Peptide vendor red flags: a 10-point checklist
Updated October 29, 2026. General buyer guidance, not medical or legal advice.
the biggest red flags are no batch-level lab report, a report you cannot verify, and promises about what a product does.
- Run the list below on any vendor, including the one you like.
The checklist
- No lab report for the batch you are buying.
- A report with no lab name, or one you cannot confirm on the lab's own page.
- Batch number missing from the report, so it cannot be matched to your package.
- Medical or results claims. A seller selling for research should not promise outcomes.
- Prices far below everyone else. Cheap can mean corners were cut.
- No clear company identity or contact method.
- Vague shipping and return terms.
- Fake urgency, such as countdown timers that reset.
- Only paid or anonymous reviews as proof.
- Pressure to pay a way you cannot dispute with no explanation of terms.
How to use it
Score one point per item that is clean. Fewer than 7 clean items means slow down. The vendor quiz does this in 60 seconds.
Then do the one check most people skip: match the batch number to the report, see how to read a COA. My own look at this vendor is in Is Growth Guys legit?
Ready to order?
Enter the code at checkout. If you copied it, just paste it in the Promo code box in the order summary, then press Apply. It does not apply by itself. Confirm the discount line before you pay.
Common questions
What is the biggest red flag?
No batch-level lab report you can verify on the lab's own page.
Is a low price a red flag?
It can be. Prices far below the market deserve extra scrutiny of the testing.
Does a fast checklist replace testing?
No. It filters out poor vendors, but only testing your own sample verifies your vial.