Retatrutide 30mg Pen Lab Results — 99.262% HPLC

Q: What is the HPLC purity of the Retatrutide 30mg Pen?

99.262% HPLC, measured by Janoshik Analytical on batch RETP002. Analysis date 4 November 2025. The full Janoshik report is published at /coa/retp002/.

Q: How can I verify the Retatrutide 30mg Pen batch independently?

Every Janoshik COA carries a task number and verification key. The full Janoshik PDF for batch RETP002 is mirrored at /janoshik-analytical-coa.pdf and the image version at /remediumtestresults.webp. The verification walkthrough at /research/how-to-verify-janoshik-coa explains how to cross-check the report against the Janoshik server.

Q: Does Retatrutide 30mg Pen purity match the rest of the Retatrutide range?

Yes — the full Remy Retatrutide line consistently tests above 99% HPLC. The 30mg Pen is 99.262% (RETP002), the 20mg Pen is 99.841% (RET-20-C-2604-001, the highest published batch), and the vial line is 99.741% (RET-20-V-2604-001, with additional heavy metals, residual TFA, and bacterial endotoxin panels). Inter-batch variation in the 0.1–0.6% range is normal for synthetic peptides and reflects analytical precision, not actual purity differences.

The Retatrutide 30mg Pen (300 clicks at 0.1 mg) is the flagship release in the Remy Peptides retatrutide line. Batch RETP002 was sent to Janoshik Analytical — an independent EU-based peptide testing lab — and returned at 99.262% HPLC purity. This page summarises the report, the testing method, and what the result means for research use. The full Janoshik PDF lives at /coa/retp002/.

Batch Facts

Product: Retatrutide 30mg Pen (flagship release)
Batch number: RETP002
Molecule: Retatrutide (LY-3437943), CAS 2381089-83-2
Purity (HPLC): 99.262%
Test method: HPLC (High-Performance Liquid Chromatography), reverse-phase
Laboratory: Janoshik Analytical — EU, independent third-party
Analysis date: 4 November 2025
Format: Pre-filled 300-click pen, 0.1 mg per click
Storage: 2–8°C, cold-chain shipping

The Test

The Janoshik panel for RETP002 was a reverse-phase HPLC assay — the analytical standard for quantifying purity of synthetic peptides. The retatrutide fraction is separated from peptide-related impurities (truncated sequences, deletion variants, synthesis byproducts) on a C18 stationary phase, then quantified against a reference retention time for the parent peptide (LY-3437943, CAS 2381089-83-2). The reported 99.262% figure is the area-under-the-curve percentage for the parent peak, normalised against the sum of all peptide-related peaks in the chromatogram.

HPLC does not detect non-peptide content — water, salts, residual organic solvents from synthesis, or endotoxin. For the Retatrutide vial line (batch RET-20-V-2604-001) Remy publishes a fuller Janoshik panel including residual TFA, heavy metals (As, Cd, Pb, Hg), and bacterial endotoxin (LAL). The 30mg pen ships pre-formulated and pH-balanced rather than as a lyophilized solid, so the relevant verification is HPLC purity of the dissolved peptide.

What This Means For Researchers

Retatrutide is a triple-receptor agonist — it engages GIP, GLP-1, and glucagon receptors with a single molecule. Triple-agonist potency is highly sensitive to sequence integrity: any truncation or deletion variant in the chain alters receptor binding for at least one of the three pathways, which makes HPLC purity verification meaningful, not cosmetic. The published Eli Lilly Phase 3 TRIUMPH-4 trial (28.7% mean weight loss at the 12mg dose) was conducted with reference-grade material; in-vitro research that aims to compare results to published trial data needs a comparable parent-peak fraction to be on the same baseline.

At 99.262% HPLC, batch RETP002 sits at the upper end of the 95–99% range that public peptide-purity references (GenScript, IonPeptide, Proto Peptide) cite as standard for research-grade peptides. The other 0.738% is peptide-related material, not contamination by a different molecular entity.

The Full Report

Full HPLC purity report from Janoshik Analytical for batch RETP002.

Janoshik Analytical HPLC report for batch RETP002 at 99.262% purity

Open PDF Open image Open batch page →

Frequently Asked

What is the HPLC purity of the Retatrutide 30mg Pen?

99.262% HPLC, measured by Janoshik Analytical on batch RETP002. Analysis date 4 November 2025. The full Janoshik report is published at /coa/retp002/.

Who tested the Retatrutide 30mg Pen COA?

Janoshik Analytical, an independent third-party peptide testing laboratory based in the EU. Every published Remy Peptides batch is sent to Janoshik before release. Remy does not host or edit the report — it is reproduced as Janoshik issued it.

How can I verify the Retatrutide 30mg Pen batch independently?

The full Janoshik PDF for batch RETP002 is mirrored at /janoshik-analytical-coa.pdf and the image version at /remediumtestresults.webp. The verification walkthrough at how to verify a Janoshik COA explains how to cross-check the report against the Janoshik server using the task number and verification key printed on the report.

Does Retatrutide 30mg Pen purity match the rest of the Retatrutide range?

Yes. The full Remy Retatrutide line consistently tests above 99% HPLC. The 30mg Pen is 99.262% (RETP002), the 20mg Pen is 99.841% (RET-20-C-2604-001, the highest published batch), and the vial line is 99.741% (RET-20-V-2604-001, with additional heavy metals, TFA, and bacterial endotoxin panels). Inter-batch variation in the 0.1–0.6% range is normal for synthetic peptides and reflects analytical precision, not actual purity differences.

Where to go next

Product page Retatrutide 30mg Pen Pricing, format, and order details for the flagship pen. Raw COA Batch RETP002 archive The batch-keyed COA page with the unedited Janoshik report. Compare 20mg Pen lab results — 99.841% The highest-purity Retatrutide batch Remy has published. Compare 10mg Vial lab results — 99.741% Janoshik HPLC plus TFA, heavy metals, and bacterial endotoxin. Compare 40mg Vial lab results — 99.741% Same Janoshik panel as the 10mg vial; bulk format for extended protocols. Archive All published COAs Every Janoshik report Remy has published, by batch. Verification method How to verify a Janoshik COA Walkthrough of task IDs and verification keys.

Retatrutide 30mg Pen Lab Results — HPLC Purity Verification