Verified batch reports

Retatrutide batch-evidence library

This library indexes published Janoshik Analytical records for Reta (retatrutide / LY-3437943) by batch ID. Each record separates HPLC purity, assay or concentration, and other tests; lists the laboratory task and verification key; and states what the available panel does not establish.

For in-vitro laboratory research only. Not for human or veterinary use.

Published batches

Four Reta evidence records with Janoshik documentation. The Remy Peptides 20mg pen leads this published purity set at 99.841%; the vial-line record adds separate heavy-metals, TFA and bacterial-endotoxin results, and RT-40-V-001 is the only batch here published with TAMC/TYMC microbial-limit results alongside those tests. Microbial counts and endotoxin are distinct measurements, and neither alone establishes compendial sterility. Use the task IDs and verification keys on each page to check the original report independently.

Remy 20mg Pen — current Batch RET-20-C-2604-001 Janoshik task 150762 · 22.51 mg/mL · tested 23 Apr 2026 99.841% HPLC Vial line — full panel Batch RET-20-V-2604-001 Heavy metals not detected · TFA not detected · endotoxin 1.449 EU/Vial 99.741% HPLC 40mg Vial — most tested Batch RT-40-V-001 TAMC/TYMC microbial limits pass · endotoxin <1 EU/Vial · heavy metals and TFA not detected · 5 verify keys 99.692% HPLC 30mg Pen — flagship Batch RETP002 Janoshik HPLC reference · tested 4 Nov 2025 99.262% HPLC

Analytical coverage by batch

This matrix is derived from dataset version 2.0.0. “Not published” means the library has no public result for that test; it does not mean the batch passed or failed it.

Published analytical-test coverage
Batch / sample	HPLC purity	Assay / content	MS / identity	Endotoxin	Metals	TFA	TAMC / TYMC	Report date	Task / key	Key limitation
`RET-20-C-2604-001` 20mg pen cartridge	99.841%	22.51 mg/mL concentration	Not published	Not published	Not published	Not published	Not published	23 Apr 2026	150762 `APSLYZGYW4KA`	Single chromatographic report; no microbial or residual panel published.
`RET-20-V-2604-001` Vial-line record	99.741%	20.92 mg assay	Not published	1.449 EU/Vial	Not detected	Not detected	Not published	21–24 Apr 2026	112563/69/64/65 4 keys	No microbial-limits result; endotoxin is not a sterility test.
`RETP002` 30mg pen	99.262%	Not published	Not published	Not published	Not published	Not published	Not published	4 Nov 2025	86428 `97SPA7G1BJUL`	Purity certificate only; content and microbial tests are not established.
`RT-40-V-001` 40mg vial	99.692%	49.80 mg assay	Not published	<1 EU/Vial	Not detected	Not detected	Pass	1–16 Jun 2026	165576–80 5 keys	Published panel does not establish suitability for human or veterinary use.

How to verify a Janoshik COA

Match the batch identifier. Confirm that the batch or sample label on the report is the exact record you intended to verify; RET-20-C-2604-001 is one worked record.
Reproduce the laboratory lookup. Enter the published verification key through Janoshik's own verification route and confirm the task number.
Compare the result and scope. Match the analysis date, test method, measured result, and stated limitations against the downloadable batch dataset. A purity result does not substitute for assay, identity, endotoxin, metals, residuals, or microbial testing.

Every record in this library publishes the task and key needed for that reproducible check. A screenshot without a laboratory lookup is weaker evidence than a key-confirmable record.

Continue with the Remy Peptides references on how to verify a Janoshik COA and how to interpret peptide COA and HPLC purity evidence.

What HPLC purity actually measures

An HPLC purity percentage is a chromatographic relative-purity result produced under the laboratory's stated method. It describes the resolved peaks the method detects; it is not automatically the absolute amount of peptide in the sample and, by itself, is not conclusive identity evidence. Assay or concentration, mass-spectrometric identity, residuals, endotoxin, metals, and microbial limits require their own procedures.

Technical basis: FDA's ICH Q6A guidance treats identification, assay, and impurities as distinct quality attributes and states that a single chromatographic retention time is not specific identity evidence. See the full Remy Research verification methodology for the evidence hierarchy and limitations.

For documented 20mg and 30mg pen configurations, the separate reta pen clicks-to-mg research calculator connects listed-material math to the matching batch records without turning it into administration guidance.

Need the plain-English answer first? Read what reta peptide is and how reta works, then come back here for batch-level evidence.

For the research context behind the leading 99.841% record, review the reta research profile.

Continue through the evidence trail

The COAs on this page document peptide batches for in-vitro research. Use this evidence layer first, then continue to mechanism and study-context pages when you need the research background.

Read the Reta guide Download the batch dataset