Retatrutide (CAS 2381089-83-2) — commonly shortened to Reta, and sometimes written R3ta — is a synthetic triple agonist peptide studied for its interaction with GIP, GLP-1, and glucagon receptor pathways simultaneously, distinguishing it from single or dual-receptor agonist peptides. PhaseOne has Retatrutide for sale online to researchers across Australia as a high-purity lyophilised powder, independently HPLC verified at ≥99% purity per batch.
As one of the newer triple-agonist research peptides, Reta is manufactured to research-grade standards with full third-party testing, shipped Australia-wide in 5mg, 10mg, 15mg, 20mg, 30mg and 60mg vials. Full Certificate of Analysis available for every batch view here.
Reta is the common shorthand for Retatrutide. You will also see it written R3ta, or misspelled as Rita peptide — all refer to the same compound, a single peptide chain that binds the GIP, GLP-1 and glucagon receptors. PhaseOne supplies it for laboratory research use only.
Retatrutide is a synthetic triple agonist peptide, studied within Australian peptide research for its simultaneous activity at GIP, GLP-1, and glucagon receptors.
Retatrutide is most often shortened to Reta. It appears in research discussion as R3ta and is sometimes misspelled Rita peptide. In published literature it is identified by its development code LY3437943. It has no consumer brand name in Australia.
PhaseOne ships Retatrutide Australia-wide for research use, dispatched locally with tracking. Every vial carries a batch-specific Certificate of Analysis verifying ≥99% HPLC purity. Retatrutide is not sold through Australian pharmacies or retail outlets.
Yes — PhaseOne has Retatrutide for sale online in 5mg through to 60mg vials, shipped Australia-wide. Because Reta has no approved consumer form, online research suppliers are the only route, which makes documentation the thing to check: every PhaseOne vial ships with its batch Certificate of Analysis so ≥99% HPLC purity can be verified on arrival rather than taken on trust.
PhaseOne prices Retatrutide from A$76.99 for a 5mg vial, with larger vials offering a lower cost per milligram. Current pricing for every strength is shown on this page, and the batch Certificate of Analysis is included at no extra cost.
No. Retatrutide is not registered on the ARTG and is not approved for supply as a medicine in Australia, so it is not stocked by Chemist Warehouse or other retail pharmacies. Pharmacies can supply approved GLP-1 medicines such as Ozempic or Mounjaro on prescription, but not Retatrutide.
Both are multi-receptor agonists. Tirzepatide binds two receptors, GIP and GLP-1. Retatrutide binds those two plus the glucagon receptor, making it a triple agonist — that third receptor is the structural difference between them. Read the full Retatrutide vs Tirzepatide comparison.
Mounjaro is a brand name for tirzepatide and Ozempic is a brand name for semaglutide — both are approved prescription medicines in Australia supplied through pharmacies. Retatrutide is an investigational compound with no approved brand name, supplied only as a research material. They are not interchangeable.
Unlike single-receptor agonists, triple agonist peptides like Retatrutide engage multiple metabolic receptor pathways at once, making them a distinct focus within current research peptide literature.
Retatrutide is supplied in 5mg, 10mg, 15mg, 20mg, 30mg and 60mg vials, all shipped Australia-wide with full batch documentation.
Unreconstituted Retatrutide should be stored refrigerated and protected from light, and is commonly reconstituted with bacteriostatic water prior to research preparation. Read our reconstitution guide.
Each PhaseOne batch is independently verified by third-party HPLC analysis, with a Certificate of Analysis available for every order shipped across Australia.
Yes - PhaseOne provides a peptide dosage calculator researchers can use as a reference tool when planning reconstitution and dilution. Use our peptide dosage calculator.
Disclaimer
All products supplied by PhaseOne are intended strictly for laboratory research purposes only. Products are not intended for human consumption, therapeutic use, cosmetic use, veterinary use, or diagnostic applications.
