Retatrutide

Metabolic & Weight Loss
Phase 3
Investigational

Retatrutide is an investigational medication that activates three hormone receptors (GIP, GLP-1, and glucagon) at the same time. Phase 2 trials showed up to 24% body weight loss at 48 weeks, and it is currently in Phase 3 development.

Last updated February 22, 2026
76 PubMed-Verified Studies
Very Popular
Research-Driven Dosage Reports
RouteSubcutaneous (SC)
Dose1–12 mg (titrated)
Frequency1× weekly
Duration48+ weeks (clinical trials)

Based on published research literature.

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Overview of Retatrutide

Triple receptor agonist that activates GIP, GLP-1, and glucagon receptors, producing synergistic effects on appetite, metabolism, and energy expenditure.

Appetite & satiety

GLP-1 receptor activation suppresses appetite and delays gastric emptying, an established satiety pathway.

GIP receptor activation may complement satiety effects (proposed), contributing to enhanced weight loss.

Metabolic / energy expenditure

Glucagon receptor activation increases hepatic energy expenditure and fatty acid oxidation, a unique addition contributing to enhanced weight loss.

Triple mechanism produces weight loss exceeding dual GIP/GLP-1 agonists, as Phase 2 trials showed up to 24.2% weight loss at highest dose.

Metabolic / glucose control

GLP-1 activation enhances glucose-dependent insulin release, improving glycemic control.

Improvements in HbA1c, liver fat, blood pressure, and lipid profiles observed in trials, with broad metabolic benefits

Read Full Retatrutide Dosage Guide

Research-backed dosing protocols, timing, and administration details

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Metabolic & Weight Loss