The Obesity-MASH Connection: Clinical Insights From the 2026 ADA Scientific Sessions

Welcome back to another AJMC Insights series. In this episode titled, 'MASH in Focus: How Patient Awareness, Clinical Empowerment, and Research Have Transformed the Field,' Nadege Gunn, MD led the conversation about the following questions: 1. As a hepatologist, how has the MASH patient population changed over the last decade? 2. Do you feel the broader medical community has kept pace with that shift? 3. How much of your current liver disease caseload would you attribute to metabolic and obesity-driven disease versus other etiologies?

In this episode, 'Screening, Risk Stratification, and the Multidisciplinary Care Model for MASH,' the hepatologist Nadege Gunn, MD explores the following questions: 1. How would you characterize the urgency of MASH as a public health problem for a primary care physician who may see the early signs? 2. In an ideal world, what does the multidisciplinary care model for a MASH patient with significant obesity look like? How far is current clinical practice from that ideal, and where do the current gaps exist?

In 'Screening MASH Upstream: Building a Practical, Scalable Algorithm for the Real World,’ Nadege Gunn, MD delves into the following critical question: 1. There is growing interest in screening for MASH further upstream. What would a practical, scalable screening algorithm look like in your view, and what are the limitations of that approach?

This episode, titled 'Risk Stratification and Weight Loss as Therapy: A Hepatologist's Framework for Managing MASH Progression,' features Nadege Gunn, MD discussing the following critical questions: 1. How do you risk-stratify your patients, and what clinical or metabolic factors most reliably predict progression? 2. What does the literature tell us about the relationship between meaningful weight loss and fibrosis regression, and how does that inform your thinking about weight-loss therapy as a hepatic intervention?

Gunn explained the scientific rationale for combining GLP-1 and glucagon receptor agonism in the context of MASH, noting that the liver contains glucagon receptors, making the combination a compelling strategy for achieving more direct hepatic targeting than GLP-1 receptor agonism alone can provide.

Gunn described her reaction to the SYNCHRONIZE-1 liver fat reduction data as genuinely compelling from a hepatology perspective, noting a reduction of up to 63% represents a level of hepatic fat clearance that could meaningfully transform the disease trajectory for patients, with the data also demonstrating reductions in non-invasive markers of fibrosis such as ELF and Pro-C3, adding further weight to the possibility that this combination could address not just fat accumulation but the fibrotic progression that drives the most serious liver-related morbidity.

Nadege Gunn examined the stark economic contrast between the cost of early pharmacologic intervention in MASH and the astronomical healthcare utilization associated with late-stage liver disease, arguing that the cost of allowing MASH to progress unchecked to the point of hepatic decompensation, liver transplantation, or hepatocellular carcinoma far exceeds the investment required to treat the disease earlier with therapies capable of reversing fibrosis and resolving MASH before those devastating endpoints are reached.

Noureddin framed MASH as one that should not be viewed in isolation by hepatologists or any other specialist, but rather understood as part of a broader cardio-liver-renal metabolic syndrome that demands comprehensive, multidisciplinary management, noting that even lean individuals with elevated visceral fat and insulin resistance can develop MASLD, and that the risk increases substantially with higher BMI and the presence of type 2 diabetes, which is strongly associated with both higher MASLD prevalence and greater rates of advanced fibrosis and cirrhosis.

Noureddin outlined the striking epidemiological burden of MASLD and MASH in patients with obesity, with prevalence climbing dramatically with increasing BMI, reaching up to 90% in patients with a BMI of 40 or higher, and affecting approximately 60% of individuals with type 2 diabetes.

Noureddin acknowledged the extraordinary challenge facing primary care physicians who are tasked with managing a patient holistically across rapidly evolving fields and expressed genuine appreciation for the breadth of responsibility they carry.

Noureddin framed the emergence of dual GLP-1/glucagon receptor agonism as a significant development, placing it alongside artificial intelligence as a transformative force in medicine, noting that while GLP-1 receptor agonists have already improved the management of metabolic syndrome and generated robust data across obesity and cardiovascular outcomes, the bar has now moved higher, with tolerability, injection frequency, oral versus injectable delivery, and liver-specific activity all emerging as key differentiators among the next generation of incretin-based therapies.

The SYNCHRONIZE-1 trial was a Phase III double-blind study in which patients with elevated BMI were randomized in a one-to-one-to-one ratio to placebo, 3.6 mg, or 6.6 mg of survodutide alongside lifestyle counseling, with the primary endpoint of at least 5% weight loss at week 76.

Noureddin drew on the prior Phase 2 survodutide data published in the New England Journal of Medicine, which demonstrated improvements in steatohepatitis histology and significant fibrosis reduction to contextualize the SYNCHRONIZE-1 findings, noting that MRI-based proton density fat fraction reduction has been shown to correlate with histologic improvement in steatohepatitis and fibrosis, suggesting the magnitude of liver fat reduction observed in SYNCHRONIZE-1 is a predictive surrogate for the histologic endpoints being evaluated in the ongoing Phase 3 LIVERAGE and LIVERAGE Cirrhosis trials.

Almandoz framed obesity, type 2 diabetes, cardiovascular disease, and MASH not as separate conditions but as different manifestations of the same underlying metabolic dysfunction, making MASH not merely a liver problem but a signal of broader cardiometabolic burden that demands comprehensive attention.

Jaime Almandoz characterized the historical management of metabolic disease as paradoxically siloed given how biologically integrated these conditions are, noting that a patient may have their obesity managed by one clinician, their diabetes by another, their cardiovascular disease by a third, and their liver disease, if addressed at all, evaluated in yet another separate setting, while the patient is experiencing all of these as one interconnected metabolic condition, creating fragmentation that delays diagnosis, duplicates effort, and leaves critical windows for intervention unaddressed.

Almandoz explained that while GLP-1 receptor agonism alone delivers meaningful benefits in appetite regulation, satiety, glycemic control, and cardiorenal and liver outcomes, the addition of glucagon receptor agonism introduces a distinct and complementary layer of biology that goes beyond weight loss alone to address the metabolic drivers most closely linked to insulin resistance, cardiometabolic risk, and MASH progression.

Almandoz described his interpretation of the SYNCHRONIZE-1 findings, noting that while substantial and statistically significant weight reduction was observed, what captured his attention most was the nature and distribution of that weight loss, with the MRI sub-study demonstrating meaningful reductions in visceral and liver fat alongside relative preservation of lean mass, collectively pointing to a quality of weight loss that is biologically distinct from generalized weight loss.

Almandoz challenged one of the most persistent misconceptions in metabolic disease management, that obesity treatment is primarily about weight loss, arguing instead that obesity is a systemic driver of healthcare utilization across multiple high-cost disease states including type 2 diabetes, cardiovascular disease, osteoarthritis, chronic kidney disease, and MASH, and that by the time a patient develops liver cirrhosis, heart failure, or end-stage kidney disease, the financial and human costs have already become enormous and largely preventable with earlier intervention.