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Occasional Heavy Drinking Triples Liver Fibrosis Risk in MASLD

Source: theepochtimes.com

TL;DR

A USC study found episodic heavy drinking triples advanced liver fibrosis odds in people with MASLD.
Among 3,969 MASLD patients from NHANES data, 16% reported heavy drinking at least monthly, with adjusted odds ratio of 2.76 for advanced fibrosis.[[1]](https://www.cghjournal.org/article/S1542-3565(26)00163-1/abstract)[[2]](https://news.keckmedicine.org/occasional-heavy-drinking-may-triple-the-risk-of-liver-damage)
Drinking pattern matters more than total volume; heavy sessions once a month harm livers more than spread-out intake.

The story at a glance

A new study from Keck Medicine of USC shows that people with metabolic dysfunction-associated steatotic liver disease (MASLD) who engage in episodic heavy drinking face nearly three times higher odds of advanced liver fibrosis compared to those with similar total alcohol intake but no heavy episodes. The research, led by Brian P. Lee and published April 2 in Clinical Gastroenterology and Hepatology, analyzed over 8,000 U.S. adults from 2017-2023 NHANES data.[[1]](https://www.cghjournal.org/article/S1542-3565(26)00163-1/abstract)[[2]](https://news.keckmedicine.org/occasional-heavy-drinking-may-triple-the-risk-of-liver-damage) It's reported now following the study's release, highlighting risks for the one-in-three U.S. adults with MASLD. MASLD involves fat buildup in the liver tied to obesity, diabetes, and high blood pressure.

Key points

Study included 8,006 adults with liver stiffness data; 4,571 had steatotic liver disease, including 3,969 with MASLD.[[1]](https://www.cghjournal.org/article/S1542-3565(26)00163-1/abstract)
Episodic heavy drinking defined as 4+ drinks in one day for women or 5+ for men, at least once a month; affected 15.9% (632) of MASLD cases.[[1]](https://www.cghjournal.org/article/S1542-3565(26)00163-1/abstract)
Compared to MASLD patients without it (matched for age, sex, weekly alcohol), episodic drinkers had 1.69 higher odds of significant fibrosis and 2.76 for advanced fibrosis.[[1]](https://www.cghjournal.org/article/S1542-3565(26)00163-1/abstract)
Significant fibrosis prevalence was 23.6% in episodic drinkers vs. 15.6% without, after adjustments.[[1]](https://www.cghjournal.org/article/S1542-3565(26)00163-1/abstract)
Including episodic drinkers in MASLD shifts classifications: MASLD drops from 48% to 40.4%, MetALD rises from 5.3% to 12.9% of steatotic cases.[[1]](https://www.cghjournal.org/article/S1542-3565(26)00163-1/abstract)
Lead author Brian P. Lee calls it a "huge wake-up call" since doctors often focus on total alcohol, not patterns.[[2]](https://news.keckmedicine.org/occasional-heavy-drinking-may-triple-the-risk-of-liver-damage)

Details and context

The study used vibration-controlled transient elastography from NHANES to measure liver stiffness, a marker for fibrosis. Researchers adjusted for average weekly alcohol, age, and sex to isolate drinking pattern effects. Heavy episodes likely cause acute inflammation overwhelming the liver, especially in already fatty MASLD livers.[[2]](https://news.keckmedicine.org/occasional-heavy-drinking-may-triple-the-risk-of-liver-damage)

MASLD affects about 33% of U.S. adults and was formerly NAFLD; it progresses silently to fibrosis, cirrhosis, or cancer without symptoms early on. Unlike alcohol-only disease (ALD), MASLD stems mainly from metabolic issues, but this shows even moderate total drinking harms if binged.

Reclassifying episodic drinkers into MetALD could refine diagnosis and treatment, as these patients may need stricter alcohol counseling.

Key quotes

“Our research suggests that the public needs to be much more aware of the danger of occasional heavy drinking and should avoid it even if they drink moderately the rest of the time.” — Dr. Brian P. Lee, principal investigator, Keck Medicine of USC[[2]](https://news.keckmedicine.org/occasional-heavy-drinking-may-triple-the-risk-of-liver-damage)

“The key takeaway is that the pattern matters very much, and episodic heavy drinking is an incredibly common pattern right now among U.S. adults.” — Dr. Brian P. Lee[[3]](https://www.foxnews.com/health/common-drinking-habit-may-quietly-triple-risk-advanced-liver-condition)

Why it matters

Advanced fibrosis raises risks of liver failure, cancer, and death, affecting millions with common MASLD. For those with MASLD, even one heavy session monthly means tripled odds of scarring versus even drinking, urging pattern awareness over totals. Watch for guidelines updating to screen episodic drinking in MASLD care, though more studies may refine thresholds.