Supplied as a matched two-vial format, the Reta Duo is intended for laboratories running extended or parallel Retatrutide investigations that would otherwise consume a single vial too quickly. Each vial arrives as a lyophilised powder with its own batch-level certificate of analysis, so purity and identity can be traced independently even when both are drawn from the same shipment. It is offered strictly as a research reagent — not for human consumption or injection, and carrying no therapeutic or dosing guidance of any kind.