Greatest Peptides

Lab Reports — Certificates of Analysis

Every batch of our research peptides undergoes independent third-party analytical testing at Freedom Diagnostics, an accredited laboratory specializing in HPLC (High-Performance Liquid Chromatography) coupled with Mass Spectrometry. Each Certificate of Analysis below is searchable on FreedomDiagnosticsTesting.com using its accession number.

All compounds shown are confirmed at 99%+ purity with passing endotoxin results per USP <85> guidelines. These products are for laboratory research use only — not for human or veterinary use.

Compound Test Result Batch Date
Retatrutide HPLC-MS Purity Analysis 99.466% 2601300009 Feb 1, 2026
Retatrutide Endotoxin Analysis (USP <85>) Pass / Pass 2601300010 Feb 1, 2026
Tirzepatide HPLC-MS Purity + Endotoxin 99.745% 2603270017 Mar 29, 2026
Tirzepatide Endotoxin Analysis (USP <85>) Pass / Pass 2603270018 Mar 29, 2026
NAD+ 100mg HPLC-MS Purity Analysis 99.795% 2603270019 Mar 29, 2026
GHK-Cu 50mg HPLC-MS Purity Analysis 99.9% 2603270020 Mar 29, 2026
BPC-157 10mg HPLC-MS Purity Analysis 99.04% 2601300011 Feb 1, 2026

Why third-party testing? Independent analytical testing is the gold standard for verifying peptide purity, identity, and endotoxin levels. We never rely on supplier claims — every batch is sent to Freedom Diagnostics for HPLC-MS purity analysis and USP <85> endotoxin testing before release.

Need a specific batch report not shown above? Email info@greatestpeptides.com with your order number and we will provide it directly.

Frequently Asked Questions

Who performs the analytical testing?

Freedom Diagnostics, an independent laboratory specializing in HPLC coupled with mass spectrometry. Testing is not performed in-house, and supplier-provided purity claims are never used in place of independent analysis.

What is an accession number and how is it used?

The accession number is the laboratory's own reference for a submitted sample. Each certificate on this page carries one, and it can be searched on FreedomDiagnosticsTesting.com to confirm the report against the laboratory's records.

What does the endotoxin result mean?

Endotoxin screening is performed against USP <85> guidelines and reported as a pass or fail for the batch. It is a separate assay from the HPLC-MS purity analysis, which is why some batches carry two certificates rather than one.

Why do purity figures differ slightly between batches?

Purity is measured per batch rather than assumed from a specification, so results vary within the passing range. Each vial is documented by the certificate issued for its own lot, not by an average across production.

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