Tirzepatide, tested by an independent U.S. lab.
The long fatty acid chain on tirzepatide is the difficult part of the synthesis, and the first thing to go missing when a batch is made badly. A backbone without its side chain still behaves like a peptide on a purity trace, so the percentage can look respectable while the molecule is wrong. What it cannot do is weigh the right amount, which is why identity here is a mass measurement and not an inference from a chromatogram. Every sample is run for intact mass by LC-MS and for purity by HPLC-UV in Elyria, Ohio, and a second analyst checks the work before the certificate is signed. Basic Bundle includes identity, purity, and quantity. Endotoxin, heavy metals, and sterility are available in higher bundles or as add-ons. Fentanyl screening and NPC (Net Peptide Content) are available as add-ons.
What tirzepatide testing costs and includes
- What is tested
- The Basic Bundle covers identity by LC-MS, measured quantity, and purity. Endotoxin, heavy metals and sterility come with the higher bundles or can be added on their own. Fentanyl screening and NPC (Net Peptide Content) are add-ons.
- Price
- $220 per sample for the Basic Bundle. Plus is $370, Pro is $500, Complete is $650. Build your order to see add-ons and the total, or see the full testing catalog.
- What to send
- One vial per sample covers the bundle base tests, NPC and the fentanyl screen. Endotoxin and heavy metals share a second vial. Sterility needs its own vial and it must arrive sealed and unopened.
- Shipping
- After checkout you get shipping instructions, a packing slip and printable vial labels. Samples go to our lab at 1131 E Broad St, Elyria, Ohio. Pack vials so they will not break or leak on the way.
- Turnaround
- 24 to 48 hours from the day your sample is received at the lab. Sterility takes three days, so orders including it finish later.
Ordering opens soon. You can build an order and create an account now.
How a sample becomes
a certificate.
Every tirzepatide sample moves through the same five steps. No shortcuts for rush orders. No unnamed hands in the middle.
Intake.
Your sample arrives. We photograph it, weigh it, log every detail, and assign a tracking number that follows it onto every page.
Prep.
A named analyst prepares the run: dissolutions, dilutions, internal standards. Their initials go in the log.
Run.
HPLC-UV for purity, LC-MS for identity, and quantitative analysis for the amount present, with system-suitability standards bracketing your sample on either side.
Review.
A second analyst reviews the chromatogram independently. Nothing ships with one set of eyes on it.
Sign.
The COA is digitally signed, hashed, and published. Anyone with the link can verify the signature against the raw data.
What we look for in tirzepatide
The whole molecule, not just a peak.
A truncated backbone or an unattached side chain can still produce a clean-looking purity number. Intact mass is what tells you the molecule in the vial is the molecule on the label.
Whether it is tirzepatide at all.
Tirzepatide and semaglutide get confused on labels and in production. They differ by 699.87 daltons on average mass, so one run settles it.
How much is actually in the vial.
Purity and quantity answer different questions. The Basic Bundle reports both purity measured by reversed-phase HPLC-UV and the measured quantity in the submitted sample.
Paper you can stake a reputation on.
A signed Certificate of Analysis
Identity, quantity, and purity on one document, signed by the analyst who approved it.
Method-level transparency
Column, wavelength, ionization mode, and acceptance criteria are stated, not implied.
Public verification
Each COA carries a hash and signature anyone can check at our verify endpoint, on or off our site.