Lab-Tested Peptides (COA)

This collection holds the research peptides with a certificate of analysis for documented batches: TB-500, Retatrutide, Tirzepatide and the BPC-157 and TB-500 blend. "COA on file" means that a report exists for the documented lots of that product and that we send it to you when you give us the lot number on your vial. It is not a purity promise for every vial in the shop.

Lab-Tested Peptides (COA) – Read the guide
4 products
TB-500
TB-500
from US$43.00 In stock
Retatrutide
Retatrutide
from US$67.00 In stock
BPC-157 / TB-500 Blend 10 mg
BPC-157 / TB-500 Blend 10 mg
US$130.00 In stock
Tirzepatide
Tirzepatide
from US$51.00 In stock

What a peptide COA contains

A certificate of analysis for a research peptide reports two measurements. Mass spectrometry confirms identity: the measured mass of the sample matches the calculated mass of the sequence. HPLC reports purity: the share of the target peptide in the sample, measured as the area of its peak against all peaks. The certificate also names the lot number, which must match the number printed on the vial. Our guide mass spectrometry vs HPLC explains both tests and what "peak purity" means.

How to get the certificate for your batch

Send our customer service team the lot number printed on your vial; the contact link is in the footer. For documented batches we send the report for exactly that lot. Products without the "COA on file" marker currently have no report, and we do not state purity figures for them. The complete range, with and without certificate, is listed under all research peptides.

All compounds on this page are research chemicals for laboratory use only. They are not medicines, supplements, foods or cosmetics and are not intended for human or veterinary use.