TB-500 is Ac-LKKTETQ-OH: seven amino acids, MW 889.0, CAS 885340-08-9. The verified identity numbers, plus the 847.0 free-acid mix-up worth avoiding.
What a TB-500 certificate of analysis should show, which identity numbers it must match, and why a 2023 peer-reviewed paper says batch testing matters.
Why BPC-157 resists enzyme breakdown, what the gastric-juice stability report actually says, and how the lyophilized powder is stored in a research lab.
What BPC-157 actually is chemically: its 15-amino-acid sequence, molecular formula, weight, CAS number, aliases, and how lab testing confirms identity.
BPC-157 purity is measured by reverse-phase HPLC. Learn what a ≥99% result means, what the other 1% is, and why lot-specific independent COAs matter.
A field-by-field walkthrough of a BPC-157 COA: the exact sequence, molecular weight, purity value, CAS number, and lot details a researcher should check.
Independent re-testing documented ~47% retatrutide failure rates across the 2025–2026 market. How to verify your batch and what real third-party testing requires.