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Comparison of Next-Generation Incretin/Agonist Peptides 

*This information has not been approved by the FDA and is not endorsed by Grey Axis Research.  It is provided for informational purposes only for researchers in the field of Incretin/Agonist Peptides.*

This document provides a side-by-side comparison of Mazdutide, Survodutide, Retatrutide, and Tirzepatide — four leading GLP-1–based investigational and approved therapies.

Peptide

Type / Targets

Developer

Trial Status (2025)

Main Effects

Reported Weight Loss

Notes

Mazdutide

Dual agonist:
GLP-1 + Glucagon

Innovent Biologics & Eli Lilly (China)

Phase III in China

Appetite suppression + ↑ energy expenditure

~15–20% in Phase II

China-focused; rival to global GLP-1 drugs

Survodutide

Dual agonist:
GLP-1 + Glucagon

Boehringer Ingelheim & Zealand Pharma

Phase II/III (obesity, MASH/NASH)

Appetite suppression + fat oxidation, liver protection

Up to ~19% at 46 weeks

Strong candidate for obesity + liver disease (MASH)

Retatrutide

Triple agonist:
GLP-1 + GIP + Glucagon

Eli Lilly

Phase II/III

Appetite suppression + ↑ energy expenditure + improved glucose metabolism

~24% at 48 weeks

Highest weight loss to date; first triple agonist

Tirzepatide

Dual agonist:
GLP-1 + GIP

Eli Lilly (Mounjaro®, Zepbound®)

FDA-approved (diabetes & obesity)

Appetite suppression + insulin sensitivity

~20–22% in obesity trials

First-in-class dual agonist; already on market

Key Takeaways:
– Tirzepatide is FDA-approved and commercially available.
– Retatrutide demonstrates the highest weight loss (~24%).
– Mazdutide and Survodutide, both GLP-1 + Glucagon dual agonists, show strong promise for obesity and liver-related conditions.
– All are under active development except Tirzepatide, which is already marketed.

Grey Axis Research

Research-Grade Compounds & Peptides

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