Retatrutide is a triple agonist research peptide that has rapidly become one of the most-bought peptides in Australia. Because it is sold almost exclusively grey-market, independent LC-MS identity and HPLC purity testing is the only way to confirm what is actually in the vial.
GLP-1 / GIP / glucagon triple agonist
Also known as: LY3437943
Why test Retatrutide?
Retatrutide is expensive, dose-sensitive, and frequently substituted with cheaper GLP-1 analogues (semaglutide, tirzepatide) or under-filled. We have seen vials labelled retatrutide come back as something else entirely.
Common issues we find
Substitution with tirzepatide or semaglutide (cheaper, similar weight)
High related-substance peaks indicating poor synthesis
Frequently asked questions
How do I test retatrutide in Australia?
Send a small portion of a sealed vial to LabDoc's Australian intake address (emailed to you when you order). We run LC-MS identity confirmation and HPLC purity for A$549 per vial, with a downloadable Certificate of Analysis.
What purity should retatrutide be?
Reference-grade retatrutide is typically ≥98% by HPLC. Anything below 95% is considered low purity for a research peptide of this price point.