Diet Quality Shapes MASLD Fibrosis Progression : Hepatol Commun | May 2026

Introduction

Metabolic Dysfunction-Associated Steatotic Liver Disease is increasingly recognized as a major driver of progressive liver fibrosis, cirrhosis and liver-related mortality worldwide. Although obesity, insulin resistance and diabetes are well-established contributors, growing evidence suggests that specific dietary patterns independently influence hepatic inflammation and fibrogenesis. However, large-scale human data evaluating how individual foods and nutrient profiles affect MASLD progression have remained limited.

Problem Statement

While experimental models demonstrate that diet composition modulates hepatic fibrosis and metabolic injury, the specific dietary factors associated with fibrosis progression in real-world MASLD populations are not well defined. Identifying protective versus harmful nutritional patterns may help refine lifestyle interventions beyond simple caloric restriction.

Summary

This large Veterans Health Administration Million Veteran Program study evaluated more than 84,000 individuals with MASLD who completed detailed dietary and lifestyle assessments, including semiquantitative food frequency questionnaires. Investigators examined associations between dietary intake patterns, fibrosis progression and incident cirrhosis using longitudinal Fibrosis-4 trajectories and validated multivariable modeling approaches.

Several dietary components were consistently associated with reduced fibrosis progression. Protective dietary patterns included frequent consumption of coffee, tea, legumes, nuts, vegetables such as broccoli and spinach, dairy products, white meat, rice/pasta and modest alcohol intake. Nutrients linked with favorable outcomes included caffeine, nitrate/vitamin K, betaine, amino acids and beta carotene. These findings support growing evidence that plant-rich, minimally processed diets with anti-inflammatory and antioxidant properties may mitigate hepatic fibrogenesis.

In contrast, refined and processed carbohydrate-rich dietary patterns were strongly associated with accelerated fibrosis progression. Higher intake of white bread, cookies, breakfast cereals and non-heme iron–rich processed foods correlated with worsening fibrosis trajectories. Certain nutrient profiles, including excess refined carbohydrates and high-fructose processed foods, were similarly linked to adverse liver outcomes. The findings reinforce mechanistic data implicating hyperinsulinemia, oxidative stress, lipotoxicity and chronic low-grade inflammation in MASLD progression.

Importantly, the study moves beyond generalized dietary recommendations by identifying specific food groups and nutrient signatures associated with either protection or progression. Coffee and caffeine again demonstrated strong hepatoprotective associations, consistent with prior studies showing antifibrotic, antioxidant and metabolic benefits. Similarly, nitrate- and vitamin K–rich vegetables may influence hepatic inflammation and endothelial function through modulation of nitric oxide signaling and oxidative pathways.

The study also highlights that dietary quality may influence MASLD natural history independently of traditional metabolic risk factors. Even after adjustment for diabetes, obesity, alcohol use and baseline fibrosis severity, several dietary associations remained significant, suggesting direct biologic effects of nutritional composition on hepatic fibrogenesis.

Overall, this large longitudinal cohort provides compelling real-world evidence that diet composition substantially influences fibrosis progression in MASLD. The findings support prioritization of plant-forward, minimally processed dietary patterns rich in vegetables, legumes, nuts and caffeine-containing beverages while limiting refined carbohydrates and ultra-processed foods as part of long-term MASLD management strategies.