Retatrutide (20mg)

Retatrutide, also called Reta, is a synthetic peptide with activity at GLP-1, GIP and glucagon receptors. This listing is for a 20mg lyophilised vial for in-vitro laboratory research. Milligrams describe the amount in the vial, not a dose or solution concentration.

The 20mg vial contains twice the labelled Retatrutide quantity of the 10mg vial. Both are lyophilised research formats. Compare the current prices and the report for the specific batch; a larger vial does not mean a different compound, higher purity or a prescribed protocol length.

Retatrutide is commonly shortened to Reta or Reta peptide. LY3437943 is its research identifier. Check the compound name and milligrams per vial when comparing listings.

The 2023 Phase 2 obesity study compared Retatrutide with placebo. It does not validate this 20mg research vial or establish superiority to semaglutide or tirzepatide. See the Retatrutide 10mg research overview for the study population and evidence limits.

Retatrutide activates GLP-1, GIP and glucagon receptors. This triple-receptor profile is studied in metabolic signalling research. Receptor activity alone does not establish a clinical benefit or a safe human-use protocol. See the original receptor research.

Semaglutide targets GLP-1 receptors; tirzepatide targets GIP and GLP-1; Retatrutide adds glucagon-receptor activity. These are different compounds. The 2023 Retatrutide obesity trial used placebo as its comparator, so its results do not establish superiority over the other two medicines.

Retatrutide is supplied as a lyophilized powder and should be reconstituted with bacteriostatic water (BAC water) immediately before use. Inject the BAC water slowly into the vial, directing the stream down the inside wall. Gently swirl to dissolve — do not shake. Once reconstituted, store at 2–8°C and use within 8–12 weeks. For a general peptide reconstitution overview see our complete peptide reconstitution guide.

Store lyophilized Retatrutide vials at -20°C, away from light and moisture. After reconstitution, refrigerate at 2–8°C and use within 8–12 weeks. Do not freeze reconstituted solution.

Aussie Peptides lists Retatrutide 20mg for in-vitro laboratory research with domestic Australian dispatch. Check this page for current stock and ordering options, and the CoA library for published reports for the specific product. A research listing is not an approved medicine supply route.