Test your tesamorelin

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 5,135.9 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/Tesamorelin: 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 tesamorelin test often catches

• Peptide or acetate salt: two different milligram figures.
• Breakdown at Asp3 and Asn8.
• Methionine 27 oxidation.
• Another GRF peptide under the tesamorelin name.
• Counter-ions that are not acetate.