Late-night eating increases liver disease risk, new research finds

Eating after dinner or right before going to bed increases a person’s risk of developing liver disease by 20 per cent to 30 per cent, according to new research published in the journal Clinical Gastroenterology and Hepatology. The study, examined by researchers across roughly 200,000 people in three separate studies, links late-night dining and snacking to metabolic dysfunction-associated steatotic liver disease (MASLD)—where fat accumulates in the organ—as well as liver cirrhosis, The Telegraph reported.

How Circadian Rhythms Affect Nighttime Digestion

Lead study author Dr Robert Wilechansky, from Oregon Health and Science University, noted that the liver operates closely in tune with the body’s natural circadian rhythms. Researchers are examining whether altering the timing of meals can improve health outcomes without requiring changes to the actual composition of the food consumed, according to findings cited by The Independent.

Co-author Dr Andrew McHill, a sleep and circadian physiologist at Oregon Health and Science University, explained that eating during the night interferes with the body’s internal biological clock, which actively promotes sleep. Dr McHill stated that this nocturnal eating reduces the body’s ability to metabolize food efficiently, leading to issues such as obesity, diabetes, and declining liver health, as reported by LBC.

Elaborating on the physiological mechanism, Dr Andrew McHill stated: We are seeing over and over again that the timing of behaviours, whether it’s sleep, eating or exercise, really matters.

What Specialists Say About the Risk Factors

While the study found a noticeable jump in liver disease diagnoses among late-night eaters compared to those who abstained from the habit, specialists emphasize that severe outcomes remain relatively uncommon among those affected. Dr Robert Wilechansky clarified this distinction, noting that only a small fraction of individuals who develop fatty liver disease progress to more serious conditions like cirrhosis, as detailed by The Sun.

Dr Robert Wilechansky stated: It’s important to remember, of the people who developed fatty liver disease, only a small fraction develop serious forms of the condition like liver cirrhosis. Even so, the big take-away here is that confining your calorie intake to several hours before bedtime might be beneficial.

Discussing the broader health context, Everyday Health reported that metabolic risk factors such as obesity and type 2 diabetes frequently accompany MASLD. Experts cited by Everyday Health noted that insulin sensitivity naturally decreases at night, meaning that consuming calories while liver metabolism operates at a lower efficiency may drive the observed disease association.

Observational Data Cannot Prove Late-Night Eating Causes Liver Disease

Researchers acknowledge several limitations within the data. Because the study was observational, investigators could not definitively prove that late-night eating directly caused liver disease, despite adjusting for variables like body mass index, diet quality, diabetes, and physical activity levels, according to Everyday Health.

To combat late-night snacking habits, Melissa Jaeger, head of nutrition at MyFitnessPal, suggests evaluating what was consumed earlier in the day to find the root cause, as reported by The Sun. Public health guidance for supporting overall liver health typically involves eating balanced diets rich in fruits, vegetables, whole grains, and legumes, staying physically active, and limiting alcohol and sugary drinks, according to Everyday Health.

However, medical guidelines regarding evening meals differ for individuals who have already progressed to advanced liver conditions. Everyday Health noted that individuals with diagnosed cirrhosis should consult a healthcare provider before attempting to avoid eating before bed, because medical professionals may actually recommend a late-evening snack to prevent prolonged fasting.