--- title: "Efinopegdutide (MK-6024): The GLP-1/Glucagon Dual That Beat Semaglutide on Liver Fat (July 22, 2026) | PepTracker Pro Blog" description: "GLP-1 drugs like semaglutide shrink liver fat mostly by making you lose weight. Efinopegdutide adds a glucagon arm that burns fat inside the liver directly - and in a head-to-head Phase 2a trial it cut liver fat by 72.7% versus semaglutide's 42.3% at matched weight loss. Here is how the oxyntomodulin-based dual agonist works, why Merck redirected a twice-shelved Hanmi molecule at MASH, and what still has to be proven on biopsy." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "Organization", "name": "PepTracker Pro", "url": "https://peptrackerpro.com", "logo": "https://peptrackerpro.com/favicon.png", "description": "Evidence-based educational resource dedicated to improving peptide research literacy.", "contactPoint": { "@type": "ContactPoint", "email": "hello@peptrackerpro.com", "contactType": "customer support" }, "sameAs": [] }, { "@context": "https://schema.org", "@type": "Article", "headline": "Efinopegdutide (MK-6024): The GLP-1/Glucagon Dual That Beat Semaglutide on Liver Fat (July 22, 2026)", "description": "GLP-1 drugs like semaglutide shrink liver fat mostly by making you lose weight. Efinopegdutide adds a glucagon arm that burns fat inside the liver directly - and in a head-to-head Phase 2a trial it cut liver fat by 72.7% versus semaglutide's 42.3% at matched weight loss. Here is how the oxyntomodulin-based dual agonist works, why Merck redirected a twice-shelved Hanmi molecule at MASH, and what still has to be proven on biopsy.", "datePublished": "2026-07-22", "dateModified": "2026-07-22", "author": { "@type": "Organization", "name": "PepTracker Pro Research Team", "url": "https://peptrackerpro.com" }, "publisher": { "@type": "Organization", "name": "PepTracker Pro", "logo": { "@type": "ImageObject", "url": "https://peptrackerpro.com/favicon.png" } }, "mainEntityOfPage": { "@type": "WebPage", "@id": "https://peptrackerpro.com/blog/efinopegdutide-mk-6024-hanmi-merck-glp1-glucagon-dual-agonist-mash-liver-fat-semaglutide-head-to-head-july-22-2026" } }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://peptrackerpro.com" }, { "@type": "ListItem", "position": 2, "name": "Blog", "item": "https://peptrackerpro.com/blog" }, { "@type": "ListItem", "position": 3, "name": "Efinopegdutide (MK-6024): The GLP-1/Glucagon Dual That Beat Semaglutide on Liver Fat (July 22, 2026)", "item": "https://peptrackerpro.com/blog/efinopegdutide-mk-6024-hanmi-merck-glp1-glucagon-dual-agonist-mash-liver-fat-semaglutide-head-to-head-july-22-2026" } ] } ] --- [Skip to main content](#main) **Educational information only.** This site does not provide medical advice. [Read full disclaimer](/disclaimer) [PepTracker Pro](/) [Home](/)[Peptides](/peptides)[Compare](/compare)[Glossary](/glossary)[Blog](/blog)[Calculators](/calculators)[Start Here](/start) [Open the App](https://app.peptrackerpro.com) [Blog](/blog)/ Efinopegdutide (MK-6024): The GLP-1/Glucagon Dual That Beat Semaglutide on Liver Fat (July 22, 2026) Research & Compounds Research & Compounds # Efinopegdutide (MK-6024): The GLP-1/Glucagon Dual That Beat Semaglutide on Liver Fat (July 22, 2026) PepTracker Pro Research Team July 22, 2026 8 min read ## Table of Contents - [A gut hormone the body already uses as a dual agonist](#section-0) - [Why add glucagon when GLP-1 already works?](#section-1) - [The head-to-head number: 72.7% vs 42.3%](#section-2) - [A molecule that changed hands twice](#section-3) - [What still has to be proven](#section-4) - [Where it sits in the pipeline](#section-5) - [The bottom line](#section-6) ## A gut hormone the body already uses as a dual agonist Efinopegdutide starts from oxyntomodulin, a peptide the gut releases after meals that naturally activates both the GLP-1 receptor and the glucagon receptor at once. Where a drug like semaglutide hits only the GLP-1 receptor, oxyntomodulin is a built-in dual agonist - the body's own way of coordinating fullness, blood sugar and energy expenditure. The problem with the natural hormone is that it lasts only minutes. Efinopegdutide is the engineered fix: a modified, protease-resistant GLP-1/glucagon dual-agonist sequence conjugated to a human IgG4 Fc fragment through a roughly 10 kDa PEG linker, using Hanmi Pharmaceutical's LAPSCovery half-life-extension platform. That chemistry turns a minutes-long signal into a once-weekly subcutaneous injection. Most of what makes efinopegdutide a drug rather than a curiosity is this half-life engineering, not new receptor biology. ## Why add glucagon when GLP-1 already works? GLP-1 receptor agonists reduce liver fat, but mostly indirectly - by driving weight loss and improving insulin sensitivity. Glucagon does something more direct. Acting on liver cells, it increases fatty-acid oxidation, raises mitochondrial energy expenditure and suppresses the liver's own fat production (de novo lipogenesis). In other words, a well-balanced glucagon signal can strip triglyceride out of the liver faster than weight loss alone would predict. The historical catch is that unopposed glucagon raises blood sugar, which is exactly why you pair it with a GLP-1 arm that lowers glucose. That balancing act - glucagon for hepatic fat-burning, GLP-1 to keep glycemia in check and add appetite suppression - is the entire rationale of GLP-1/glucagon co-agonism for liver disease, and efinopegdutide is one of its cleanest tests. ## The head-to-head number: 72.7% vs 42.3% Most early metabolic trials use a placebo control, which tells you a drug works but not whether it beats the standard of care. Efinopegdutide's Phase 2a did the harder thing. Published in the Journal of Hepatology in 2023, it randomized 145 adults with NAFLD and MRI-confirmed liver fat to efinopegdutide 10 mg or semaglutide 1 mg, both once weekly for 24 weeks. The least-squares mean relative reduction in liver fat content was 72.7% with efinopegdutide versus 42.3% with semaglutide - a large, statistically significant gap - and about two-thirds of efinopegdutide recipients dropped below the 5% liver-fat threshold that defines a normal liver. The detail that matters most: weight loss was similar in both arms (roughly 8.5% vs 7.1%). Because the two groups lost about the same weight, the extra liver-fat clearance is attributable to the glucagon-driven hepatic mechanism, not to greater appetite suppression. The cost was tolerability - efinopegdutide caused somewhat more nausea and vomiting, in line with the class and an unoptimized dose. ## A molecule that changed hands twice Efinopegdutide has an unusually well-traveled history. Hanmi discovered it as HM12525A and licensed it to Janssen (Johnson & Johnson) in 2015 for $105 million upfront, where it became JNJ-64565111 and was tested in obesity and type 2 diabetes. J&J handed the rights back after those programs underwhelmed. In 2020 Merck picked the compound up, renamed it MK-6024, and - crucially - repositioned it away from weight loss and toward fatty liver disease, where the glucagon arm's direct hepatic effect is the differentiator rather than a liability. That pivot from 'another obesity drug' to 'a liver drug that happens to cause weight loss' is the strategic story of efinopegdutide, and it mirrors how the whole field has come to view the glucagon receptor: less a weight-loss accelerant, more a targeted tool for hepatic metabolism. ## What still has to be proven The strongest human evidence so far is an imaging surrogate - MRI-measured liver fat at 24 weeks. That is genuinely predictive, but it is not the finish line. Regulators approving MASH drugs want biopsy-confirmed outcomes: resolution of steatohepatitis without worsening fibrosis, and improvement in fibrosis without worsening MASH. Merck holds FDA Fast Track designation and is running Phase 2b work on those histological endpoints, plus a dedicated Phase 2 study in compensated (F4) cirrhosis due to steatohepatitis (MK-6024-017, NCT06465186), with primary completion estimated in 2026. Whether the striking liver-fat numbers translate into biopsy benefit is the open question that efinopegdutide shares with the entire MASH field - the surrogate-versus-outcome debate now at the center of steatotic-liver-disease drug development. ## Where it sits in the pipeline As a GLP-1/glucagon dual, efinopegdutide competes directly with pemvidutide, survodutide, cotadutide and mazdutide, and on the MASH battlefield it lines up against the FGF21 analogs (efruxifermin, pegozafermin, efimosfermin) and the triple agonist efocipegtrutide. Its calling card is the benchmark it set - a published, head-to-head win over semaglutide on the imaging endpoint MASH programs are judged by. But it is investigational: not approved, not a supplement, and not a product available for purchase. Any 'efinopegdutide' or 'MK-6024' offered by a research-chemical vendor is unverified and is not the studied drug. For now it is a compound to watch, not to use. ## The bottom line Efinopegdutide is an oxyntomodulin-based, once-weekly GLP-1/glucagon co-agonist that Merck is developing for MASH after two prior owners tried and set it aside for obesity and diabetes. Its Phase 2a head-to-head cut liver fat by 72.7% versus semaglutide's 42.3% at matched weight loss - isolating the glucagon arm's direct hepatic effect as the reason. That makes it one of the more compelling GLP-1/glucagon stories for the liver specifically. The remaining question is the one that governs the whole MASH field: does dramatic liver-fat reduction on MRI become resolution of steatohepatitis and fibrosis improvement on biopsy? The answer is what the current trials are built to find. Ready to track your peptide research? [Open PepTracker Pro](https://app.peptrackerpro.com) PepTracker Pro Research Team The PepTracker Pro Research Team is an editorial group of science writers, pharmacologists, and clinical researchers dedicated to making peptide science accessible. Every article is reviewed for accuracy against peer-reviewed sources and updated as new evidence emerges. ## Citations 1. \[1\] A phase IIa active-comparator-controlled study to evaluate the efficacy and safety of efinopegdutide in patients with non-alcoholic fatty liver disease - Journal of Hepatology, 2023 [Source](https://pubmed.ncbi.nlm.nih.gov/37355043/) 2. \[2\] Merck to Present Data for Efinopegdutide (MK-6024) in Patients with NAFLD at EASL 2023 - Merck.com [Source](https://www.merck.com/news/merck-to-present-data-for-efinopegdutide-mk-6024-an-investigational-glp-1-glucagon-receptor-co-agonist-in-patients-with-nonalcoholic-fatty-liver-disease-nafld-at-easl-2023/) 3. \[3\] A Clinical Study of Efinopegdutide in Compensated Cirrhosis Due to Steatohepatitis (MK-6024-017) - ClinicalTrials.gov NCT06465186 [Source](https://clinicaltrials.gov/study/NCT06465186) 4. \[4\] Efinopegdutide - Wikipedia (identifiers, mechanism, development history) [Source](https://en.wikipedia.org/wiki/Efinopegdutide) 5. \[5\] Merck bags J&J castoff from Hanmi to expand NASH pipeline - Fierce Biotech [Source](https://www.fiercebiotech.com/biotech/merck-bags-j-j-castoff-from-hanmi-to-expand-nash-pipeline) **Disclaimer:** This article is for educational purposes only and does not constitute medical advice. Always consult a licensed healthcare provider. [Read full research disclaimer →](/research-disclaimer) ## Related Articles [![Research & Compounds cover image](/assets/blog-peptide-guides-BQE1jAYz.jpg)](/blog/efocipegtrutide-hm15211-hanmi-glp1-gip-glucagon-triple-agonist-mash-liver-fibrosis-july-09-2026) Research & Compounds [ ### Efocipegtrutide (HM15211): Hanmi's GLP-1/GIP/Glucagon Triple Agonist Aims at Liver Disease, Not Just Weight (July 9, 2026) ](/blog/efocipegtrutide-hm15211-hanmi-glp1-gip-glucagon-triple-agonist-mash-liver-fibrosis-july-09-2026) Most triple agonists chase weight loss. Hanmi's efocipegtrutide (HM15211) is built for the liver: a once-weekly GLP-1/GIP/glucagon agonist whose glucagon arm drives energy expenditure and direct anti-fibrotic effects in MASH. Here's how the LAPSCovery Fc-fusion design works, what the liver-fat data show, and why its MASH-first, orphan-designated positioning sets it apart from retatrutide. PepTracker Pro Team July 9, 2026 8 min read efocipegtrutideHM15211Hanmi Pharmaceutical [Read](/blog/efocipegtrutide-hm15211-hanmi-glp1-gip-glucagon-triple-agonist-mash-liver-fibrosis-july-09-2026) [![Research & Compounds cover image](/assets/blog-peptide-guides-BQE1jAYz.jpg)](/blog/pegozafermin-bio89-100-glycopegylated-fgf21-analog-mash-fibrosis-roche-89bio-july-10-2026) Research & Compounds [ ### Pegozafermin (BIO89-100): The glycoPEGylated FGF21 Analog Betting on Fibrosis Reversal in MASH (July 10, 2026) ](/blog/pegozafermin-bio89-100-glycopegylated-fgf21-analog-mash-fibrosis-roche-89bio-july-10-2026) Most of the obesity headlines belong to the incretins. Pegozafermin (BIO89-100) takes a different route to the liver: a glycoPEGylated FGF21 analog engineered for a ~55-100 hour half-life and weekly-to-biweekly dosing. In Phase 2b ENLIVEN it improved fibrosis and resolved MASH at rates far above placebo - and its 2025 acquisition by Roche put a major spotlight on the FGF21 mechanism. Here's how the drug works, what the data show, and how it fits alongside efruxifermin and the incretin-based MASH contenders. PepTracker Pro Team July 10, 2026 8 min read pegozaferminBIO89-100FGF21 [Read](/blog/pegozafermin-bio89-100-glycopegylated-fgf21-analog-mash-fibrosis-roche-89bio-july-10-2026) [![Research & Compounds cover image](/assets/blog-peptide-guides-BQE1jAYz.jpg)](/blog/efruxifermin-efx-akr-001-akero-fc-fgf21-fusion-mash-cirrhosis-reversal-synchrony-july-12-2026) Research & Compounds [ ### Efruxifermin (EFX): The Fc-FGF21 Fusion Betting It Can Reverse MASH Cirrhosis (July 12, 2026) ](/blog/efruxifermin-efx-akr-001-akero-fc-fgf21-fusion-mash-cirrhosis-reversal-synchrony-july-12-2026) The incretins own the obesity headlines, but the liver has its own race - and it is between two FGF21 analogs. Efruxifermin (EFX) is Akero's bivalent Fc-FGF21 fusion protein, dosed once weekly, and its ambition is bigger than cutting liver fat: in Phase 2b it improved fibrosis in three-quarters of pre-cirrhotic MASH patients and reversed compensated cirrhosis in roughly two of five. Here is how the drug is built, what the HARMONY and SYMMETRY data show, and how it stacks up against pegozafermin as the Phase 3 SYNCHRONY program reads out. PepTracker Pro Team July 12, 2026 8 min read efruxiferminEFXAKR-001 [Read](/blog/efruxifermin-efx-akr-001-akero-fc-fgf21-fusion-mash-cirrhosis-reversal-synchrony-july-12-2026) [PepTracker Pro](/) Educational peptide information and research tracking tools. Not medical advice. #### Explore - [Peptide Directory](/peptides) - [Compare Peptides](/compare) - [Glossary](/glossary) - [Benefits](/benefits/sleep) #### Learn - [Blog](/blog) - [Calculators](/calculators) - [Start Here](/start) - [About](/about) #### Legal - [Editorial Policy](/editorial-policy) - [Research Disclaimer](/research-disclaimer) - [Disclaimer](/disclaimer) - [Privacy Policy](/privacy) - [Terms of Service](/terms) - [Contact](/contact) © 2026 PepTracker Pro. Educational purposes only. Not medical advice. Always consult a licensed healthcare provider.