By Lew Kizer — 2026-10-21 — Health & Nutrition
The short answer
An Oregon Health & Science University study published in Clinical Gastroenterology and Hepatology in 2026 analyzed nearly 200,000 participants in the Nurses' Health Studies and Health Professionals Follow-Up Study. People who regularly ate late at night had a 20% to 30% higher risk of metabolic dysfunction-associated steatotic liver disease (MASLD) and cirrhosis than those who did not. The study was observational and cannot prove cause.
Key facts
- Nearly 200,000 participants from three long-running U.S. cohorts.
- Regular late-night eaters had 20% to 30% higher risk of MASLD and cirrhosis.
- Published in Clinical Gastroenterology and Hepatology (DOI 10.1016/j.cgh.2026.09.047).
- Eating times were self-reported in broad categories.
- Fatty liver disease affects up to 30% of the U.S. population.
- OHSU is recruiting for a trial testing whether eating earlier improves liver health.
KINGSPORT, Tenn., Oct. 21, 2026 — When you eat may matter for your liver, not only what you eat. That is the suggestion of a large study from Oregon Health & Science University.
This article reports research news and is not medical advice. Talk with your clinician before changing your diet or medicines.
What the researchers found
The team analyzed nearly 200,000 people in three long-running cohorts: the Nurses' Health Study, the Nurses' Health Study II and the Health Professionals Follow-Up Study. Participants who regularly ate after dinner or around bedtime had a 20% to 30% higher risk of metabolic dysfunction-associated steatotic liver disease (MASLD) and cirrhosis than those who did not.
“the big take-away here is that confining your calorie intake to several hours before bedtime might be beneficial.” — Robert Wilechansky, M.D., lead author, OHSU
Reading it carefully
The study relied on self-reported eating habits in broad categories, and other differences between late and early eaters could explain part of the link. The proposed reason, that the liver handles food differently when the body is preparing for sleep, is a hypothesis. OHSU is now recruiting for a trial that will test whether eating earlier improves liver health directly.
| What the study shows | What it does not show |
|---|---|
| Late eaters had higher rates of liver disease | That late eating causes it |
| A consistent link across three cohorts | An exact safe cutoff time |
| Timing may matter alongside diet | That timing matters more than what you eat |
Making an earlier dinner realistic
Our new guides cover late-night eating and meal timing and food for fatty liver disease.
“You shouldn't have to drive anywhere or cook anything. We'll bring the food to you. Fresh, portioned, gluten-free, macro-counted. Your job is just to eat.” — Lew Kizer, Founder, SmashMeals
Commentary, not medical advice
The SmashMeals perspective
For a lot of the people we feed, late dinners are not a choice. Night-shift nurses, parents and anyone getting home after seven end up eating whatever is fastest, late. This study does not prove timing causes liver disease, but it lines up with a simple habit: have a real dinner ready early so the kitchen can close for the night. A meal that is already cooked makes that much easier.
Frequently asked questions
Is eating late at night bad for your liver?
A 2026 study of nearly 200,000 adults found regular late-night eaters had a 20% to 30% higher risk of fatty liver disease and cirrhosis. It was observational, so it shows an association, not proof that late eating causes liver disease.
How many hours before bed should I stop eating?
The study did not set a cutoff. Its lead author, Robert Wilechansky, M.D., said confining calories to several hours before bedtime might be beneficial. Ask your clinician what fits your schedule and medicines.
What diet is recommended for fatty liver disease?
The American Gastroenterological Association's patient guidance points to the Mediterranean diet, half a plate of non-starchy vegetables, limited added sugar and saturated fat, avoiding alcohol and at least 150 minutes of moderate activity a week.
Sources and credits
Follow the original sources for context and verification. A reference is not an endorsement of SmashMeals.
- Late-night eating is associated with MASLD and cirrhosis: the Nurses' Health Study and Health Professionals Follow-Up Study (opens in a new tab)
Clinical Gastroenterology and Hepatology
Why it matters: The study itself.
- Eating late at night linked to up to 30% higher risk of liver disease (opens in a new tab)
ScienceDaily (Oregon Health & Science University)
Why it matters: Plain-language summary with researcher quotes and caveats.
- MASLD and lifestyle changes for weight management (opens in a new tab)
American Gastroenterological Association
Why it matters: Patient guidance on diet and activity for fatty liver disease.