Name: Retatrutide 40mg (10 Vials / Kit)
Brand: Uther Peptide
SKU: UP-RETATRUTIDE-40MG
Price: 400.00 USD
Availability: InStock

What is Retatrutide?

Retatrutide (LY3437943) is a synthetic peptide carrying a fatty-acid side chain that promotes albumin binding and extended circulation, supporting once-weekly dosing schedules in clinical research settings. It is distinguished from earlier incretin-based candidates by combining activity at three receptors rather than one or two within a single molecule.

How it is understood to work

GLP-1 and GIP receptor activation are studied for glucose-dependent insulin secretion, slowed gastric emptying and reduced appetite signaling, mechanisms shared with earlier incretin therapies. The added glucagon-receptor agonism is the distinguishing feature of retatrutide, proposed to increase hepatic fatty-acid oxidation and overall energy expenditure alongside the incretin effects.

Research status

Retatrutide is an investigational compound that has advanced through Phase 2 human clinical trials examining obesity, type 2 diabetes and hepatic fat reduction, with published results describing substantial body-weight and liver-fat changes relative to placebo; it has not received regulatory approval and remains under active clinical investigation, so long-term safety and outcome data are still accumulating.

This listing: Uther Peptide Retatrutide

Brand: Uther Peptide
Kit: 10 vials × 40 mg (400 mg in total)
Price per vial: $40.00
Price per mg: $1.00
Other strengths: 5mg $85.00 · 10mg $110.00 · 15mg $165.00 · 20mg $185.00 · 30mg $220.00 · 50mg $450.00
Also sold by: HK Peptide 40mg $400.00 · HK Peptide 10mg $110.00 · HK Peptide 15mg $165.00 · HK Peptide 20mg $185.00 · HK Peptide 30mg $220.00 · HK Peptide 50mg $450.00

Lab testing

Uther Peptide published a Janoshik report for this compound. Test: Identity & purity. Result: Reta 40mg. Tested Oct 2, 2025.

View the report · How to read it (Testing 101) · Every report for this compound

Bought through escrow: the brand is only paid after you confirm delivery. If the parcel never arrives, or an independent test shows the wrong compound or a significant under-fill, open a claim before releasing payment.

Specifications

Compound: Retatrutide
Also known as: LY3437943
Class: Investigational triple GLP-1/GIP/glucagon receptor agonist
Form: Lyophilized (freeze-dried) powder
Per vial: 40mg
Molecular formula: C221H342N46O68
Molecular weight: ~4731.3 g/mol
Stated purity: 99%

Handling & storage

Supplied as a lyophilized powder; store unopened vials at -20C protected from light, and once reconstituted with bacteriostatic water keep refrigerated at 2-8C for use within the study’s defined timeframe.

Concentration check: adding 2 ml of bacteriostatic water to one 40 mg vial gives 20 mg/ml. The Research Lab calculator in your dashboard works this out for any volume.

Questions

Is retatrutide an approved medicine?

No. It remains an investigational compound in clinical trials and has not received marketing approval from any regulatory agency, unlike some single-receptor incretin agonists that are approved drugs.

How does retatrutide differ from dual GLP-1/GIP agonists?

Retatrutide adds glucagon-receptor agonism on top of GLP-1 and GIP activity, a third mechanism studied for its distinct effect on hepatic fat oxidation and energy expenditure that dual agonists do not target.

How much Retatrutide is in this kit?

10 vials of 40 mg each, so 400 mg in total. The lab testing section above shows what the brand’s tested vial actually contained.

For laboratory research use only. Not for human or veterinary use. Nothing on this page is medical advice.