For research use only. Not for human consumption. Not medical advice — consult a licensed clinician.

Independent test result

Tirzeppatide

by Reta One Labs· batch TR300626

99.96 %

measured purity· May 13, 2026

New to reading a COA? See how to read a peptide COA →

How this batch compares

This batch measured 99.96%, 0.09 pts above Reta One Labs's average of 99.87% for this peptide over 17 batches, and 0.31 pts above the all-vendor average of 99.64% across 383 COAs from 54 vendors.

74.5% 100.0%
This batch 99.96% Vendor avg (17 batches) 99.87% Peptide avg (383 COAs) 99.64%
Compare pricing

See Tirzeppatide pricing across 54 verified vendors

Merit's price comparison page pulls current listings so you can cross-check purity history vendor by vendor before you buy.