Test your tirzepatide

What is tested

• Identity, purity and amount

  Price confirmed at launch

  • Identity: is the molecule in the vial the one on the label
  • Purity: HPLC peak area percentage
  • Amount: measured milligrams against the label claim

  Turnaround: Confirmed when the partner lab is signed

• Identity, purity, amount and endotoxin

  Price confirmed at launch

  • Everything in the standard package
  • Bacterial endotoxin by LAL assay

  Turnaround: Confirmed when the partner lab is signed

• Endotoxin only

  Price confirmed at launch

  • Bacterial endotoxin by LAL assay
  • Does not establish identity, purity or amount

  Turnaround: Confirmed when the partner lab is signed

Method

Identity

Mass spectrometry, looking for a molecular weight of about 4,813.53 g/mol.

Purity

HPLC with UV detection, reported as the main peak's share of total peak area.

Amount

HPLC quantitation against a reference standard, reported in milligrams per vial.

Analysed by

Partner laboratory to be announced

Full methods/Tirzepatide: identity card and what usually goes wrong

Sample requirements

• One sealed, unopened vial, with its label intact. Opened vials cannot be tested because the contents may have changed.
• A clear photo of the label and batch code before you send it.
• Any label amount can be tested.
• Tell us where you bought it. The vendor name stays private unless you choose a public record.

What a tirzepatide test often catches

• A different GLP-1 class peptide under a tirzepatide label.
• Chains missing or gaining one residue.
• Oxidation at tryptophan 25 and deamidation at glutamine.
• Average and monoisotopic mass confused on a certificate.
• Counter-ions and water counted as peptide.