≥99.0%
HPLC purity on every report
Janoshik
Independent third-party laboratory
20–60 mg
Retatrutide & Tirzepatide pens tested
Retatrutide lab reports
Each report below is the original certificate issued by the laboratory, matched to the batch we ship. Click any report to open the full PDF, or verify it directly on the Janoshik website.
Click to open PDF
Apex Pharma✓ Independently tested
Retatrutide content
7.37 mg/ml
Analysis date
04 Feb 2026
Janoshik Analytical · Task #105303 · Assessment of a peptide pen · Sample was tested twice. Verification key MMHV4D7H8Q94.
Click to open PDF
Apex Pharma✓ Independently tested
Retatrutide content
17.34 mg/ml
Analysis date
24 Jul 2026
Janoshik Analytical · Task #204875 · GLP-1 peptide blind test · Cresol (preservative) peak not counted among impurities. Verification key Y7A4BJ97KYQI.
Click to open PDF
Apex Pharma✓ Independently tested
Retatrutide content
27.72 mg/ml
Analysis date
04 Feb 2026
Janoshik Analytical · Task #105307 · Assessment of a peptide pen. Verification key RCZTVKV3S1I8.
Tirzepatide lab reports
Original Janoshik certificates for our Tirzepatide pens, matched to the batch we ship. Click any report to open the full PDF, or verify it directly on the Janoshik website.
Click to open PDF
Apex Pharma✓ Independently tested
Tirzepatide content
17.88 mg/ml
Analysis date
31 Aug 2026
Janoshik Analytical · Task #224432 · GLP-1 peptide blind test · Purity includes peptide peaks only. Verification key 9THU6D22GYHN.
Click to open PDF
Apex Pharma✓ Independently tested
Tirzepatide content
25.93 mg/ml
Analysis date
31 Aug 2026
Janoshik Analytical · Task #224433 · GLP-1 peptide blind test · Cresol (preservative) peak not counted among impurities. Verification key VI928TV1W4JR.
A COA for Tirzepatide 20 mg Pen is not yet available from the manufacturer. It will be published here as soon as it is issued.
How to read a COA
A quick guide to the main fields on each certificate.
Batch
The production lot the sample came from. It is printed on the report and matches the batch shown on the product page.
Purity (HPLC)
The share of the sample that is the target peptide, measured by high-performance liquid chromatography. Higher is better; all reports here are above 99%.
Peptide content (mg/ml)
The measured concentration of retatrutide or tirzepatide in the liquid sample. Total content per pen depends on the fill volume.
Task number
The laboratory’s own reference number for the test, printed at the top of every report.
Need a report that isn’t listed?
New reports are added here as further batches are tested. If you need the COA for another product or batch, our team will send it to you.
Request a COA
Reports are published exactly as issued by the testing laboratory. All products are supplied for laboratory research use only and are not intended for human or veterinary use.