A new study has raised concerns that even a single episode of heavy drinking per month could significantly increase the risk of serious liver damage, particularly among individuals already living with metabolic dysfunction–associated steatotic liver disease (MASLD).
Researchers suggest that what is commonly viewed as occasional alcohol indulgence may carry greater health risks than previously understood, especially for those with underlying liver conditions. MASLD, formerly known as non-alcoholic fatty liver disease, is now recognised as the most widespread liver disorder in the UK, affecting around one in three adults.
The condition develops when excess fat accumulates in the liver, often without obvious symptoms in its early stages. It is more frequently seen in people who are overweight, physically inactive or have poor dietary habits, and is also linked to conditions such as type 2 diabetes, high blood pressure, high cholesterol and polycystic ovary syndrome.
The research, carried out in the United States and published in Clinical Gastroenterology and Hepatology, found that individuals who engaged in binge drinking at least once a month were around three times more likely to develop advanced liver fibrosis compared with those who spread the same amount of alcohol intake more evenly.
Liver fibrosis refers to the formation of scar tissue in the liver, which can progress to cirrhosis if left unchecked. Cirrhosis is a serious, irreversible condition that can lead to liver failure, internal bleeding and other life-threatening complications.
Experts involved in the study described the findings as a major warning for public health awareness, noting that medical assessments often focus on total alcohol consumption rather than drinking patterns. Researchers argue that episodic heavy drinking may be more harmful than previously assumed.
The study analysed data from more than 8,000 adults between 2017 and 2023. It found that binge drinking was more commonly reported among younger adults and men, with over half of participants with MASLD admitting to occasional heavy alcohol consumption.
Medical professionals say the findings could have wider implications beyond those with MASLD, urging greater attention to drinking habits even among individuals who consider their alcohol intake to be moderate overall.
