Study Links Late-Night Eating to Higher Liver Disease Risk
Eating After Dinner Tied to Increased Risk of Liver Disease
People who regularly consume food after dinner or late at night face a 20% to 30% higher risk of developing liver disease, according to a study published on October 10 in Clinical Gastroenterology and Hepatology.
The research, which examined data from nearly 200,000 participants across three nationwide studies, links late-night eating patterns to conditions such as metabolic dysfunction-associated steatotic liver disease (MASLD) and cirrhosis. Researchers at Oregon Health & Science University (OHSU) suggest that confining calorie intake to several hours before bedtime may help protect long-term liver health without requiring major dietary composition changes.
- Eating after dinner or bedtime is associated with a 20% to 30% higher risk of liver disease compared to avoiding late meals.
- The findings stem from an observational analysis of nearly 200,000 participants across the Nurses’ Health Study, Nurses’ Health Study II, and Health Professionals Follow-up Study.
- While the study highlights a strong statistical link, researchers note that the study cannot establish cause and effect.
Three US Cohorts Provide Data on Meal Timing
The investigation into meal timing and hepatic outcomes drew from three large U.S. cohorts: the Nurses’ Health Study, the Nurses’ Health Study II, and the Health Professionals Follow-up Study. Participants in these projects provided detailed self-reported data regarding their eating habits, daily routines, and lifestyle factors. Researchers categorized these individuals based on when they typically consumed their final meals and compared those schedules against medical diagnoses of fatty liver disease and cirrhosis.
The resulting data revealed a consistent association. Individuals who habitually snacked or ate meals late at night showed a 20% to 30% increase in all forms of liver disease compared to peers who refrained from late eating. MASLD, the most common form of liver disease worldwide, develops when excess fat accumulates in the liver. While it frequently presents without symptoms, advanced progression can lead to inflammation and irreversible scarring known as cirrhosis. Dr. Robert Wilechansky, a hepatologist at OHSU specializing in liver transplantation and lead author of the study, noted that while fatty liver disease affects roughly 30% of the U.S. population, only a small fraction of those affected progress to severe complications like cirrhosis.
Circadian Rhythms Affect How the Liver Processes Nutrients
The biological rationale connecting late-night eating to hepatic stress centers on the body’s circadian rhythms. The liver regulates nutrient processing, blood sugar maintenance, and energy storage in alignment with the approximately 24-hour cycle of internal biological processes. Eating during biological nighttime—when the body naturally prepares for sleep—diminishes the metabolic efficiency required to process nutrients properly.
Dr. Andrew W. McHill, an associate professor at OHSU specializing in sleep and circadian physiology and co-author of the study, emphasized that the timing of daily behaviors heavily dictates metabolic health. Previous studies have connected late-night eating with obesity and cardiovascular problems. Animal models also identify the liver as particularly vulnerable when the normal alignment between eating and sleeping is disrupted.
Evaluating Current Evidence
Because the analysis was observational and relied heavily on participants’ self-reported information, the study cannot establish direct cause and effect. Unmeasured confounding factors could influence the observed association between late eating and hepatic outcomes.
Funding for the published research was provided by the American Association of the Study of Liver Diseases Foundation under award CTORA24-179910. The research team included investigators from OHSU and Massachusetts General Hospital.
Disclaimer: The information provided in this article is for educational and scientific communication purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider regarding any medical condition, diagnosis, or treatment plan.